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    A New Early-maturing,High-quality and Large-size Cross Breeding Longan Cultivar‘Baoshi 1’
    ZHENG Shaoquan, JIANG Jimou, DENG Chaojun, JIANG Fan, CHEN Xiuping, HU Wenshun, XU Jiahui, XU Qizhi, and SU Wenbing
    Acta Horticulturae Sinica    2020, 47 (S2): 2947-2948.   DOI: 10.16420/j.issn.0513-353x.2020-0738
    Abstract713)      PDF (1680KB)(27)      
    ‘Baoshi 1’is an excellent offspring from‘Dongbao 9’בShixia’crossing population. It was selected for its early-maturing,high-quality and large fruit size features after years’ comprehensive fruit quality evaluation. The medium vigor tree is easy to form inflorescence. The large fruit clusters set fruits with uniform size,semi-round shape,and yellowish white flesh. Each fruit weight in 14.3–16.5 g. The juicy flesh is crisp,delicate-based slag and can be easy free from seed. The esculent rate is 70.0%–76.4%,the TSS is 19.5%–20.3%,the texture tastes sweet and in excellent quality. This cultivar is identified with high and stable production yield. The fruits mature early in Fuzhou(late August to early September).
    Identification and Expression Analysis of HSP90 Gene Family Under High Temperature Stress in Apple
    YAO Fuwen, WANG Meige, SONG Chunhui, SONG Shangwei, JIAO Jian, WANG Miaomiao, WANG Kun, BAI Tuanhui, ZHENG Xianbo
    Acta Horticulturae Sinica    2021, 48 (5): 849-859.   DOI: 10.16420/j.issn.0513-353x.2020-0895
    Abstract683)   HTML81)    PDF (1831KB)(1103)      

    In order to explore the role of heat shock protein(HSP90)gene family members in heat tolerance of apple(Malus × domestica Borkh.),bioinformatics method was used to identify the apple HSP90 gene family members,and their physicochemical properties,gene structure,cis elements,phylogenetic relationship and expression characteristics of HSP90 gene family under high temperature stress as well as in different tissues were analyzed. The results showed that a total of 11 HSP90 family members were identified in apple genome,which were distributed on 10 chromosomes. The amino acid sequence size was ranged from 104 to 818 aa,and molecular weight of protein ranged from 11.81 to 93.58 kD. Transcriptome analysis showed that four genes(MdHSP90-1,MdHSP90-3,MdHSP90-5and MdHSP90-11)of the 11 members were significantly up-regulated under high temperature stress. Subcellular localization analysis showed that MdHSP90-1,MdHSP90-3 and MdHSP90-5 proteins were located in the cell cytoplasm and nucleus,whereas MdHSP90-11 was targeted to the nucleus. Subsequent qRT-PCR analysis showed that the expression trend of the four genes in the two kinds of apple rootstocks were similar,the expression level increased greatly in the early stage of high temperature stress,and decreased in the middle and late stage. Four genes were also detected in different apple tissues,and the expressions of fourHSP90 genes were induced by heat stress to varying degrees,which indicated that the above four HSP90 genes may play an important role in the heat tolerance of apple.

    Roles of CAMTA/SR in Plant Growth and Development and Stress Response
    GU Jiamao, WANG Chenyang, WANG Feng, QI Mingfang, LIU Yufeng, LI Tianlai
    Acta Horticulturae Sinica    2021, 48 (4): 613-631.   DOI: 10.16420/j.issn.0513-353x.2020-0473
    Abstract516)   HTML74)    PDF (815KB)(620)      

    Calmodulin-binding transcription activators(CAMTA)are a family of transcription factors that widely exist in plants and can be combined with calmodulin(CaM),they are also called SRs because they are respond to a variety of signals. They play an important role in growth and development as well as in response to stress. In this paper,we summarized the discovery process,structure,and roles of CAMTA/SR in growth and under stress,in order to provide reference for future research on CAMTA/SR.

    Genome-wide Identification and Abiotic Stress Response Analysis of MLP Family Genes in Apple
    LI Xinxin, HOU Hongmin, XU Jihua, SUN Xiaohong, ZHANG Yugang
    Acta Horticulturae Sinica    2021, 48 (1): 1-14.   DOI: 10.16420/j.issn.0513-353x.2020-0276
    Abstract478)   HTML14)    PDF (4937KB)(713)      

    In the apple,13 Major Latex Protein(MLP)genes MdMLP were identified,and through sequence alignment and construction of the MdMLP protein homologous model,it was found that MdMLP contained a typical Gly-rich loop region structure of Bet_v_1 proteins, which was a unique GxxxxxG structure in the MLP family. Comparison of MLP phylogeny and collinearity in different species indicated that MdMLP had similar gene structure,conserved domain and high homology with other Rosaceae MLP members. qRT-PCR analysis showed that all MdMLP genes had different levels of expression in 14 organs of apple‘Xinjiang 1’. At the same time,MdMLP genes responded to ABA,NaCl,PEG,cold(4 ℃)and heat(40 ℃)stress treatments,and the same subgroup genes showed a similar expression trend when exposed to abiotic stress. It suggested that MdMLP may interact with PRSP,SNRK1/2,bHLH and ABA-related transcriptional proteins to participate in the defense against abiotic stress in apple.

    A New Extremely Early-maturing,High-quality and Large-size White- flesh Loquat Cultivar‘Sanyuebai’
    ZHENG Shaoquan, JIANG Jimou, JIANG Fan, DENG Chaojun, CHEN Xiuping, HU Wenshun, XU Jiahui, XU Qizhi, and SU Wenbing
    Acta Horticulturae Sinica    2020, 47 (S2): 2955-2956.   DOI: 10.16420/j.issn.0513-353x.2020-0736
    Abstract465)      PDF (882KB)(27)      
    ‘Sanyuebai’is an excellent offspring from‘Zaozhong 6’בXinbai 2’crossing population,it was selected for extremely early-maturing,high-quality,large-size and white texture. The fruit is in suborbicular or obovate shape with uniform size that weights 53.5–63.4 g. The texture is yellowish white to pale orange and the peel is easy to be stripped. The thick,white or yellowish white texture is delicate-based slag. The esculent rate is 71.4%–74.9%;the TSS is 13.7%–16.8%. With excellent quality,the fruit tastes fresh and sweet. In Fuzhou,the fruit matures extremely early in early March–early April,about 15 days earlier than‘Zaozhong 6’. The yield of three-year tree is 12.77 kg per plant.
    Cloning and Expression Analysis of the Cytokinin Response Regulator VlRR5 in Kyoho Grapevine
    BIAN Lu, GUO Dalong, YU Keke, WEI Tonglu, PEI Maosong, LIU Hainan, YU Yihe
    Acta Horticulturae Sinica    2021, 48 (8): 1437-1445.   DOI: 10.16420/j.issn.0513-353x.2020-0668
    Abstract449)   HTML50)    PDF (1742KB)(363)      

    There are three fruit-dropping peaks in grape growth and development. Grape fruit-dropping phenomenon is more serious in Kyoho grapevine. In this study,a cytokinin response regulator VlRR5 was cloned from Kyoho grapevine,which has a phosphoric acid receptor domain(REC)and a MYB-like DNA binding domain. Sequence analysis revealed that cDNA of VlRR5 was 2 597 bp in length,encoding 693 amino acids,and located on chromosome 4 of grape. Subcellular localization assay showed that VlRR5 was localized in the nucleus. The yeast transformed into pGBKT7-VlRR5 could grow normally and turn blue on SD/-Trp/-Ade/-His/+X-α-Gal deficient medium,which proved that VlRR5 was a transcription factor with transcriptional activation activity. By quantitative real-time PCR analysis,VlRR5 was characterized by tissue specific expression and showed high expression level in leaf and stem,which was increased and then decreased in the development stage of young fruit. The expression level increased after treatment with exogenous cytokinin,and decreased after treatment with the cytokinin synthesis inhibitor lovastatin. These results indicated that VlRR5 can respond to cytokinin and plays an important role in participating in cytokinin to improve the fruiting rate of grape.

    Cloning and Functional Characterization of Chalcone Synthase Genes(CmCHS)from Clivia miniata
    LIU Yue, LI Yueqing, MENG Xiangyu, HUANG Jing, TANG Hao, LI Yuanheng, GAO Xiang, and ZHAO Chunli,
    Acta Horticulturae Sinica    2021, 48 (10): 1847-1858.   DOI: 10.16420/j.issn.0513-353x.2021-0090
    Abstract441)      PDF (4349KB)(625)      
    In order to investigate the structure and function of Chalcone Synthase from Clivia miniata,members of CHS gene family were screened and identified based on the previously constructed transcriptome database. The results showed that four CmCHSs(CmCHS1,CmCHS2,CmCHS3 and CmCHS4)genes were cloned in C. miniata. The open reading frames of the four CmCHSs were 1 173,1 170,1 173 and 1 173 bp and encoding 390,389,390,390 respectively. Amino acid sequence that CmCHSs had typical the conserved domains. Phylogenetic tree analysis showed that the four CmCHS genes clustered with the bona-fide CHSs from other plants and belonged to type Ⅲ polyketide synthase(PKS)super family. The results of subcellular localization showed that they were localized in the cytoplasm and nucleus. Gene expressionanalysis showed CmCHS1 and CmCHS2 were highly expressed at the late stage of flower development process,and the transcripts of CmCHS1,CmCHS2 and CmCHS3 were confirmed to the extensively detected in pigmented leaves and red fruit peels. In contrast,the expression level of CmCHS4 gene was relatively low. In order to firmly verified the roles of CmCHSs in the biosynthesis of anthocyanins,prokaryotic expression vectors,pET-32-CmCHS,were constructed and recombinant proteins were prepared and purified,which were subjected to in vitro enzyme activity analysis. Results showed that the four CmCHS recombinant proteins could catalyze coumarinyl-CoA and malonyl-Coenzyme A into naringenin chalcone. This study explored the bioinformatics analysis,gene expression analysis,and functional analysis of CmCHS genes,and laid a theoretical foundation for the genetic transformation and flower color improvement of C. miniata.
    Cloning and Functional Analysis of Squalene Synthase Gene in Citrus
    WANG Fusheng, LIU Xiaona, XU Yuanyuan, LIU Xiaofeng, ZHU Shiping, ZHAO Xiaochun
    Acta Horticulturae Sinica    2021, 48 (9): 1641-1652.   DOI: 10.16420/j.issn.0513-353x.2021-0580
    Abstract430)   HTML45)    PDF (1598KB)(1182)      

    A squalene synthase(SQS)gene was isolated from 18 citrus accessions,and its sequence and expression characteristics were analyzed. The roles in the biosynthesis of limonoids were identified by genetic transformation. The results showed that the full length of SQS ORF(open reading frame)in citrus is 1 242 bp,coding 413 amino acids except in the accessions of Rongan Kumquat(Fortunella classifalia)and Xiaoguo Kumquat(F. margarita). Clustal analysis showed that the deduced amino acids of SQS shared from 97.1% to 100% homology among the 18 citrus accessions. SQS in Xiaoguo kumquat,Rongan kumquat,and No.4 Ichang Papeda(Citrus ichangensis)shared a G/C nonsynonymous mutation at the fourteenth nucleotide of CDS region. Phylogenetic analysis result of SQS proteins showed that the SQS of those accessions clustered together. qRT-PCR analysis showed that the highest expression of SQS was observed in flower,followed by that in stem,root,leaf,and young fruit. The expression level of SQS gene is positively correlated with the limonoids contents in seeds of Guanxi Mi You(C. grandis)variety at different development stages. Four positive SQS interference transgenic citrus plants(SiN-1-SiN-4)were obtained via citrus genetic transformation. The expression levels of SQS gene in four transgenic lines were 61.00% to 79.00% of the control plants. Obvious deduction on limonin content was observed in all the four transgenic lines(about 35.83% to 81.56% of the control plants). The contents of nomilin in SiN-1 and SiN-2 lines were decreased to 80.11% and 94.94% of the control,respectively. However,the nomilin content increased by 52.76% and 35.30% in SiN-3 and SiN-4 lines,respectively. The expression levels of genes belonging to oxidosqualene cyclase(OSC)superfamily involved in triterpenoids and sterol biosynthesis were down-regulated in SQS interference transgenic citrus plants. This may due to the reduced supply of precursor for triterpenoids and sterol biosynthesis. This study indicated that SQS gene contributed greatly to the production of limonoids in citrus.

    Identification and Expression Analysis of the Vacuolar Iron Transporter Gene Family in Apple
    YANG Yaming, DING Yuduan, CHEN Lijuan, TIAN Xueting, YIN Weijie, PENG Honghui, DU Wei, LIANG Liping, REN Xiaolin
    Acta Horticulturae Sinica    2021, 48 (2): 205-218.   DOI: 10.16420/j.issn.0513-353x.2020-0272
    Abstract426)   HTML19)    PDF (2976KB)(399)      

    Vacuolar iron transporter(VIT)is involved in iron storage and transport,it plays important roles in plant photosynthesis,nitrogen fixation,respiration,DNA and hormone synthesis. In this study,nine apple VIT genes were identified,and the phylogenetic relationship of these genes was analyzed by phylogeny,the results showed that the VIT protein of apple was closely related to the evolution of Arabidopsis thaliana. Chromosome mapping showed that nine VIT genes are distributed on seven chromosomes,bioinformatic analysis of VIT genes promoter region showed many cis-elements related to environmental stresses,photoresponse and plant hormone response. Expression profile analysis showed that the expression of VIT gene was relatively high in flowers and fruits. In addition,the physical and chemical properties,protein interaction network and gene structure of MdVIT family were analyzed,the results showed that the main factors for VIT family amplification in apple were tandem duplication and segmental duplication,cationic co-transporters(XP_008372221.1 and XP_008383418.1)were mainly involved in the interaction of VIT proteins in apple. The qRT-PCR analysis showed that the expression levels of MdVIT1 and MdVIT2 in leaves of‘M26’apple rootstock seedlings treated with 2 000 μmol · L-1 FeSO4 · 7H2O for 24 h were 6.6 and 12 times higher than those of the control. After 6 h treatment with 2 000 μmol · L-1 FeSO4 · 7H2O,the relative expression level of MdVIT4 showed in the stem was the highest,which was 237 times higher than that of the control. Taken together,among the characterized apple VIT genes MdVIT1,MdVIT2 and MdVIT4 were speculated closely related to iron stress in apple,which provide useful information for further study the mechanisms of metal iron caused stress in apple.

    A New Tetraploid Sweet Cherry Dwarf Rootstock Cultivar‘Aijie’
    ZHU Dongzi, WANG Jiawei, HONG Po, WEI Hairong, TAN Yue, and LIU Qingzhong,
    Acta Horticulturae Sinica    2020, 47 (S2): 2895-2896.   DOI: 10.16420/j.issn.0513-353x.2020-0060
    Abstract422)      PDF (1312KB)(71)      
    ‘Aijie’,formerly known as‘LBS’,is a new tetraploid dwarf sweet cherry rootstock,selected from the progeny of hexaploid‘Gisela 6’(Prunus cerasus × P. canescens). The grafting compatibility with most sweet cherry varieties was good,the grafting interface was smooth,and there was no big or small foot phenomenon. The average grafting survival rate was 87.3%. The sweet cherry grafted on‘Aijie’rootstock began to blossom in the next year,with 4-year high yield,3–5 years earlier than that grafted on vigorous rootstocks. In the 4th year after planting,the number of branches,tree height,dry perimeter and crown diameter of the‘Summit/Aijie’rootstock were all larger than those of‘Summit/Gisela 6’. The average plant yield of the‘Summit/Aijie’was 24.3% higher than that of‘Summit/Gisela 6’.
    A New Extremely Late-maturing,High-fragrance,High-quality and Large-size Cross Breeding Longan Cultivar‘Dongxiang’
    A New Extremely Late-maturing, High-fragrance, High-quality and Large-size Cross Breeding Longan Cultivar‘Dongxiang’
    Acta Horticulturae Sinica    2020, 47 (S2): 2951-2952.   DOI: 10.16420/j.issn.0513-353x.2020-0739
    Abstract410)      PDF (1149KB)(16)      
    ‘Dongxiang’is an excellent offspring from‘Dongbao9’בWanxiang’crossing population. It was selected for extremely late-maturing,high fragrance,high-quality and large-size. The uniform fruits were large and weight 14.6–16.7 g in brown green peel and oblate shape. The milky,juicy flesh is crisp,delicate-based slag and can be easy free from seed. The esculent rate is 71.2%–73.5%,the TSS is 23.1%–24.2%. Totally,the sweet texture with abundant fragrance is of excellent comprehensive quality. The tree is easily to form inflorescence,and its fruits mature extremely late in mid-October to late November in Fuzhou,and which were able to be stored on the tree for a long period after ripening.
    Research Progress on the Effect of Phytochrome-interacting Factors in Plant Resistance to Abiotic Stress
    YUE Lingqi, XING Qiaojuan, ZHANG Xiaolan, LIANG Xue, WANG Qian, QI Hongyan
    Acta Horticulturae Sinica    2021, 48 (4): 632-646.   DOI: 10.16420/j.issn.0513-353x.2020-0506
    Abstract394)   HTML35)    PDF (1206KB)(336)      

    Belonging to bHLH(Basic Helix-Loop-Helix)transcriptional factor family,phytochrome- interaction factors(PIFs) are involved in many biological processes of plants. As the“hub”of intracellular signal regulation,PIFs not only participate in the regulation of plant growth and development,but also plays an important role in the process of plant resistance to stress. The main points of this paper are:PIFs integrate complex networks to regulate plant responses to abiotic stresses such as temperature,shading stress and drought,meanwhile,they mediate the defense of plants against biotic stresses such as pests and diseases through plant hormone signaling pathway. Our research could provide reference for further study of PIFs.

    Effects of Low Temperature Storage on Energy Metabolism,Related Physiology and Quality in‘Jinhong’Apple Fruit
    WANG Zhihua, JIA Chaoshuang, WANG Wenhui, TONG Wei, and JIANG Yunbin
    Acta Horticulturae Sinica    2020, 47 (12): 2277-2289.   DOI: 10.16420/j.issn.0513-353x.2020-0418
    Abstract374)      PDF (825KB)(461)      
    In order to investigate the effect of low temperature storage on energy metabolism and physiological quality of‘Jinhong’apple fruit,‘Jinhong’apple fruit were stored at low temperature conditions of–2,0,2 and 4 ℃,and the energy-related substance was regularly measured such as adenosine triphosphate(ATP),adenosine diphosphate(ADP),adenosine monophosphate(AMP)content,energy charge(EC)and H+-ATPase,Ca2+-ATPase, succinate dehydrogenase(SDH)and cytochrome oxidase (CCO),superoxide dismutase(SOD)and other related enzyme activities. At the same time we measured the fruit respiration intensity,ethylene release,fruit hardness,vitamin C,titratable acid,soluble solids content and other physiological quality indicators,and investigated the fruit tissue browning index. The results showed that the ATP,ADP and AXP contents,EC and energy-related metabolic enzyme except Ca2+-ATPase activities,SOD activity and ethylene release of fruits stored at–2 ℃ were kept to the lowest throughout storage and shelf life,and the vitamin C content decreased rapidly in the later period. The fruit hardness,soluble solids content and titratable acid content remained the lowest at 4 ℃.The browning index of fruit at–2 ℃ was the highest(both skin and flesh were severely browned),the skin and flesh of the fruit stored at 0 ℃ had slight browning,and the fruit stored at 2 and 4 ℃ had no browning. During storage of 30,45,90 d,90 d + 3 d shelf life and 90 d + 5 d shelf life,fruit stored at 2 ℃ maintained higher energy levels,and fruit quality and flavor remained well,followed by fruit at 0 ℃. The results showed that there was a close relationship between tissue browning and energy deficit. The more energy deficit,the more serious browning. Appropriate low temperature can maintain a higher energy charge level of the fruit,while inhibiting pericarp browning,maintaining fruit storage quality,and delaying fruit senescence.
    Genome-wide Identification,Comparative Evolution and Expression Analysis of PEBP Gene Family from Capsicum annuum
    NIU Xiqaing, LUO Xiaoyun, KANG Kaicheng, HUANG Xianzhong, HU Nengbing, SUI Yihu, AI Hao
    Acta Horticulturae Sinica    2021, 48 (5): 947-959.   DOI: 10.16420/j.issn.0513-353x.2020-0800
    Abstract339)   HTML18)    PDF (3542KB)(308)      

    The plant phosphatidyl ethanolamine-binding protein(PEBP)is divided into three subfamilies:MFT-like,FT-like,and TFL1-like. The FT and TFL1 subfamilies comprise the florigen-antiflorigen system of plants that regulate flowering time and plant architecture. Here,the PEBP gene family was identified by genome-wide identification of the whole genome data of the annual pepper (Capsicum annuum),and the structures of gene and protein,comparative evolution,collinearity and tissue expression profile were analyzed. The results showed that the C. annuum genome contains nine PEBP genes,including one MFT,four FT,and four TFL1 genes. All the nine PEBPgenes contain four exons and three introns,which are located on six chromosomes. Moreover,these nine PEBP proteins are located in the cytoplasm and nucleus. Comparative evolution analysis between C. annuum and Solanum lycopersicum showed that CaPEBP genes were subjected to purification selection during evolution. Among them,CaFT2 and CaFT4 were relatively stable during evolution;there were eight pairs of collinearity genes between pepper and tomato. The qRT-PCR expression profile ofCaPEBP genes were significantly differentially expressed in the tissues tested. For example,CaMFT/CaTFL1-1 was highly expressed in fruits,and CaFT1 had the highest relative expression level in leaves;the expression of CaFT3 was the highest in shoot apical meristem and flower,while CaTFL1-4 was specifically expressed in roots.

    QTL Mapping of Bolting and Flowering Traits Based on High Density Genetic Map of Radish
    GAN Caixia, CUI Lei, PANG Wenxing, WANG Aihua, YU Xiaoqing, DENG Xiaohui, SONG Liping, PIAO Zhongyun
    Acta Horticulturae Sinica    2021, 48 (7): 1273-1281.   DOI: 10.16420/j.issn.0513-353x.2021-0201
    Abstract324)   HTML51)    PDF (1459KB)(276)      

    The late-bolting genes in radish were localized,and the candidate genes regulating flowering were explored. The main results are listed below:a high-density genetic linkage map was constructed and two QTL loci related to flowering and bolting were detected. Based on radish gene annotation and gene sequence alignment analysis,we detected five genes with the sequence variation between the parental lines,indicated those genes associated with bolting and flowering in radish. However,the detailed functions of the candidate gene during the radish bolting and flowering need further studies.

    A New Phalaenopsis Cultivar‘Red Swan’
    CHEN Chun, ZHUANG Xiqing, CHEN Xiaochou, ZHANG Yizhi, LIN Chenli, and WANG Yong
    Acta Horticulturae Sinica    2020, 47 (S2): 3049-3050.   DOI: 10.16420/j.issn.0513-353x.2020-0877
    Abstract320)      PDF (1028KB)(44)      
    ‘Red Swan’ is a new large flowered Phalaenopsis cultivar bred by artificial hybridization of Phalaenopsis‘Formosa Rose’as female parent and‘Sogo Beach Super Firebird’as male parent. The average diameter of flowers is 10.3 cm,the longitudinal diameter of flowers is 10.1 cm,and the number of flowers is 8–10. The flower ears are naturally curved,so it is not necessary to shape them artificially. The flower bud is very sensitive to low temperature,and it blooms before the year. It is suitable to be used as a spring festival cultivar in China. The flowering period is as long as 119 days.
    A New High-quality,Large-size and High-fragrance Cross Breeding Longan Cultivar‘Cuixiang’
    ZHENG Shaoquan, JIANG Jimou, DENG Chaojun, JIANG Fan, CHEN Xiuping, HU Wenshun, XU Jiahui, XU Qizhi, and SU Wenbing
    Acta Horticulturae Sinica    2020, 47 (S2): 2949-2950.   DOI: 10.16420/j.issn.0513-353x.2020-0740
    Abstract317)      PDF (1313KB)(23)      
    ‘Cuixiang’is an excellent offspring from‘Dongbao 9’בCuiyu’crossing population. It was selected for its high-quality,large-size and high fragrance. The large fruit cluster set fruits in uniform size,oblate shape. Single fruit weight is 14.7–16.3 g. The juicy flesh with abundant fragrance is crisp,delicate-based slag and easy to be free from seed. The esculent rate is 70.6%–76.3%,the TSS is 19.5%–22.8%. The sweet and fragrant fruit is in excellent comprehensive quality. It is suitable for both table eating and further production processing. The tree is easy to initiate flower bud and set large size inflorescence under normal orchard management.
    A New Extremely Early-maturing,High-quality and Large-size Loquat Cultivar‘Baixuezao’
    ZHENG Shaoquan, JIANG Jimou, DENG Chaojun, JIANG Fan, CHEN Xiuping, HU Wenshun, XU Jiahui, XU Qizhi, and SU Wenbing
    Acta Horticulturae Sinica    2020, 47 (S2): 2957-2958.   DOI: 10.16420/j.issn.0513-353x.2020-0737
    Abstract317)      PDF (1074KB)(27)      
    ‘Baixuezao’is an excellent offspring from‘Zaozhong 6’בXinbai 2’crossing population,it was selected for extremely early-maturing,high-quality,large-size and white texture. The fruits are in oval shape with uniform size that weight 51.9–61.0 g. The light yellow peel is easy to be stripped and the thick texture is white and delicate-based slag. The fruit tastes fresh and sweet,the esculent rate is 68.5%–71.8%,and the TSS is 13.9%–14.9%. In Fuzhou,the fruit matures extremely early in early April,about 3 days earlier than‘Zaozhong 6’. The yield of three-year tree is 17.4 kg per plant.
    Status and Prospects Whole Genome Sequencing in Fruit Trees
    HUANG Weijian, LI Meng
    Acta Horticulturae Sinica    2021, 48 (4): 733-748.   DOI: 10.16420/j.issn.0513-353x.2020-0069
    Abstract314)   HTML23)    PDF (336KB)(336)      

    Whole genome sequencing can obtain genome sequence information of species,which is very important for exploring the origin and evolution of the species,and fundamental for the development and utilization of genes. This article reviewed the progress of genome sequencing of seven important fruit trees(apple,citrus,grape,pear,strawberry,banana and peach),discussed the currently existing problems of whole genome sequencing of fruit trees,and elaborated selection of DNA sequencing technology,openness of sequencing data,and research after sequencing and other issues in the future research.

    A New Early Ripening Nectarine Cultivar‘Zhongnong Zaozhenzhu’
    WANG Yingying, LIU Lichang, LIU Zhiwu, ZHENG Xiaocui, WANG Xiaodi
    Acta Horticulturae Sinica    2021, 48 (4): 839-840.   DOI: 10.16420/j.issn.0513-353x.2019-0908
    Abstract312)   HTML6)    PDF (1327KB)(124)      

    ‘Zhongnong Zaozhenzhu’is a new nectarine cultivar selected from a seedling of‘Qiuhongzhu’. The flower is showy with more than five pink petals for ornamental and early flowering. The fruit is small,round with average weight of 72.9 g. Its flesh and pericap are light green. The fruit skin color is bright,and the attractive red blush covers over 3/4 of the skin surface. The soluble soilds content is 14.1%;titratable acid content is 0.54%;vitamin C content is 56 μg·g-1. It has a good charateristic for storage and transportation,which ripens in late-June in Ju County,Rizhao City,Shandong Province. The yield is up to 275 00 kg·hm-2.