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园艺学报 ›› 2022, Vol. 49 ›› Issue (3): 533-547.doi: 10.16420/j.issn.0513-353x.2021-0100

• 研究论文 • 上一篇    下一篇

Ogura CMS青花菜育性恢复材料创制及其遗传背景研究

黄静静1, 刘伟2, 刘玉梅1, 韩风庆1, 方智远1, 杨丽梅1, 庄木1, 张扬勇1, 吕红豪1, 王勇1, 季家磊1, 李占省1,*()   

  1. 1中国农业科学院蔬菜花卉研究所,农业部园艺作物生物学与种质创制重点实验室,北京 100081
    2中蔬生物科技(寿光)有限公司,山东寿光 262700
  • 收稿日期:2021-03-08 修回日期:2021-11-08 出版日期:2022-03-25 发布日期:2022-03-25
  • 通讯作者: 李占省 E-mail:lizhansheng@caas.cn
  • 基金资助:
    国家重点研发计划项目(2017YFD0101805);国家现代农业产业技术体系建设专项资金项目(CARS-23-A05);中国农业科学院科技创新工程项目(CAAS-ASTIP-IVFCAAS)

Creation of Fertility Restorer Materials for Ogura CMS Broccoli and the Study of Its Genetic Background

HUANG Jingjing1, LIU Wei2, LIU Yumei1, HAN Fengqing1, FANG Zhiyuan1, YANG Limei1, ZHUANG Mu1, ZHANG Yangyong1, LÜ Honghao1, WANG Yong1, JI Jialei1, LI Zhansheng1,*()   

  1. 1Key Laboratory of Horticultural Crop Biology and Germplasm Creation,Ministry of Agriculture,Institute of Vegetables and Flowers,Chinese Academy of Agricultural Sciences,Beijing 100081,China
    2China Vegetable Biotechnology Shouguang Co.,Ltd,Shouguang,Shandong 262700,China
  • Received:2021-03-08 Revised:2021-11-08 Online:2022-03-25 Published:2022-03-25
  • Contact: LI Zhansheng E-mail:lizhansheng@caas.cn

摘要:

利用含有育性恢复基因Rfo的芥蓝中间材料(14Y12),通过杂交转育途径将该基因导入6份优良Ogura CMS青花菜中,并从农艺性状、细胞水平和遗传多样性方面揭示其变化特征及遗传背景。分子鉴定结果表明,Ogura CMS青花菜Rfo杂交后代(F1代)中,14个株系含有Rfo基因,Rfo基因传递效率约为40%。在农艺性状方面,Rfo转育后代农艺性状偏向青花菜,且遗传分离明显。在细胞水平方面,Rfo转育后代花粉活力(70% ~ 85%)存在显著差异(P < 0.05);减数分裂后期有染色体不均等分裂和染色体丢失的异常现象;部分Rfo转育后代的花粉管能够正常生长,而一些后代花粉管发育受阻或不正常;倍性鉴定表明,Rfo转育后代中二倍体12份,占总体比例54.55%,介于三倍体和四倍体的杂合倍性10份,占总体比例45.45%。遗传分析结果表明,在遗传相似系数0.50处,芥蓝14Y12、青花菜17B1253及Rfo转育后代可分为两大亚群:A亚群有10份,遗传背景偏向芥蓝;B亚群有22份,全部为青花菜。Rfo转育后代与芥蓝遗传相似系数为0.24 ~ 0.88,其中19B809-8单株与芥蓝遗传背景最远,遗传相似系数为0.24,可作为Ogura类型青花菜育性恢复的亲本材料。

关键词: 青花菜, Ogura CMS, 育性恢复, 遗传背景

Abstract:

The Chinese kale material(14Y12)containing the Ogura CMS fertility restorer gene Rfo was used to introduce the Rfo restorer gene into six excellent Ogura CMS broccoli through cross breeding,and revealed its change characteristics and genetic background from the aspects of agronomic traits,cell level and genetic diversity. The results showed that the agronomic traits of Ogura CMS broccoli hybrids(F1 generation)were biased towards broccoli and genetic segregation was obvious. At the cellular level,there was a significant difference in the pollen viability of Rfo-transformed offsprings(P < 0.05),and the range was between 70% and 85%. There were abnormal phenomena of unequal division of chromosomes and loss of chromosomes in the late stage of meiosis. The pollen tubes of some Rfo-transformed offspring could be formed normally,while the pollen tube development of some Rfo-transformed offspring was blocked or abnormal. The ploidy identification showed that there were 12 diploids in Rfo-transformed offspring,accounting for 54.55% of the total,and 10 heterozygous ploidy between triploid and tetraploid,accounting for 45.45% of the total. The results of genetic analysis showed that at the genetic similarity coefficient of 0.50. Chinese kale 14Y12,broccoli 17B1253 and their Rfo-transformed offspring could be divided into two categories:A subgroup had 10 copies,with a genetic background biased toward Chinese kale;B subgroup had 22 copies,all of which are broccoli. The genetic similarity coefficient between Rfo-transformed offspring and Chinese kale was from 0.24 to 0.88,among which 19B809-8 had the farthest genetic background to Chinese kale,and the genetic similarity coefficient was 0.24,which could be used as the parent material for the fertility restoration of Ogura broccoli.

Key words: broccoli, Ogura CMS, fertility restorer, genetic background

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