Screening for Genetic Variation in Photosynthesis and High Photosynthetic Efficiency Germplasm in Potato

doi:10.16420/j.issn.0513-353x.2020-0904

Acta Horticulturae Sinica ›› 2021, Vol. 48 ›› Issue (11): 2239-2250.doi: 10.16420/j.issn.0513-353x.2020-0904

• Original article • Previous Articles Next Articles

Screening for Genetic Variation in Photosynthesis and High Photosynthetic Efficiency Germplasm in Potato

XU Guochun, LUO Wenbin, LI Huawei, XU Yongqing, JI Rongchang, ZHANG Hong, QIU Sixin, TANG Hao()

Scientific Observing and Experimental Station of Tuber and Root Crops in South China,Ministry of Agriculture and Rural Affairs,Fujian Engineering Research Center for Characteristic Upland Crops Breeding,Crop Research Institute,Fujian Academy of Agricultural Sciences,Fuzhou 350013,China

Received:2021-04-21 Revised:2021-05-26 Published:2021-12-02
Contact: TANG Hao E-mail:tanghao9403@163.com

Abstract

Abstract:

Twenty-four potato germplasms from different geographical regions were used to measure leaf gas exchange,instantaneous carboxylation efficiency（CE）,stomatal limitation value（L_s）,intrinsic water use efficiency（iWUE）and chlorophyll content（SPAD）of potato. Correlation analysis,principal component analysis and cluster analysis were combined to evaluate the genetic variation and screen high photosynthetic efficiency germplasm of tested materials. The results showed that,significant variation in all photosynthetic traits were observed among 24 germplasms,the coefficient of variation ranging from 8.42% to 25.21%,and more obviously variation in stomatal conductance（G_s）,transpiration rate（T_r）,L_s and iWUE were found,suggesting a promising opportunity for selection of greater photosynthetic efficiency in potato. Analysis of broad-sense heritability（h²）showed that,the h² of photosynthetic traits varied from 11.95% to 83.69%,six traits had a high level of heritability,whose h² were exceeded 60%,and the highest heritability was observed in SPAD（83.69%）. Principal component and cluster analysis revealed that,twenty-four germplasms were divided into three photosynthetic efficiency groups,and screened out eight germplasm with relatively higher photosynthetic efficiency,including‘Minshu 4’,‘Minshu 7’,‘Yunshu 108’,‘Yunshu 109’,‘Tianshu 10’,‘Longshu 7’,‘N210’and‘Longshu 9’. These germplasms can be used as genetic resources for the photosynthetic mechanism research and high photosynthetic efficiency breeding. In addition,the SPAD was significantly and positively correlated with comprehensive evaluation value of photosynthetic efficiency,so SPAD could be used as an early screening indicators of photosynthetic efficiency in potato germplasms.

Key words: potato, photosynthetic efficiency, genetic variation, germplasms screening, SPAD

CLC Number:

S532

XU Guochun, LUO Wenbin, LI Huawei, XU Yongqing, JI Rongchang, ZHANG Hong, QIU Sixin, TANG Hao. Screening for Genetic Variation in Photosynthesis and High Photosynthetic Efficiency Germplasm in Potato[J]. Acta Horticulturae Sinica, 2021, 48(11): 2239-2250.

Figures/Tables 9

References 26

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编号 Code	种质资源 Germplasm	来源 Origin	编号 Code	种质资源 Germplasm	来源 Origin
Y1	紫花851 Zihua 851	黑龙江 Heilongjiang	Y13	N210	北京 Beijing
Y2	费乌瑞它 Favorita	荷兰 Netherlands	Y14	N215	北京 Beijing
Y3	闽薯1号 Minshu 1	福建 Fujian	Y15	D597	北京 Beijing
Y4	闽薯4号 Minshu 4	福建 Fujian	Y16	龙薯9号 Longshu 9	黑龙江 Heilongjiang
Y5	闽薯9号 Minshu 9	福建 Fujian	Y17	龙薯14号 Longshu 14	黑龙江 Heilongjiang
Y6	闽薯6号 Minshu 6	福建 Fujian	Y18	W8	新疆 Xinjiang
Y7	闽薯7号 Minshu 7	福建 Fujian	W1	中龙薯1号 Zhonglongshu 1	黑龙江 Heilongjiang
Y8	云薯108 Yunshu 108	云南 Yunnan	P1	闽彩薯2号 Mincaishu 2	福建 Fujian
Y9	云薯109 Yunshu 109	云南 Yunnan	P2	闽彩薯3号 Mincaishu 3	福建 Fujian
Y10	天薯10号 Tianshu 10	甘肃 Gansu	P3	华颂66 Huasong 66	内蒙古 Inner Mongolia
Y11	陇薯7号 Longshu 7	甘肃 Gansu	R1	红美 Hongmei	内蒙古 Inner Mongolia
Y12	N143	北京 Beijing	R2	红玫瑰 Hongmeigui	山东 Shandong

编号 Code	种质资源 Germplasm	来源 Origin	编号 Code	种质资源 Germplasm	来源 Origin
Y1	紫花851 Zihua 851	黑龙江 Heilongjiang	Y13	N210	北京 Beijing
Y2	费乌瑞它 Favorita	荷兰 Netherlands	Y14	N215	北京 Beijing
Y3	闽薯1号 Minshu 1	福建 Fujian	Y15	D597	北京 Beijing
Y4	闽薯4号 Minshu 4	福建 Fujian	Y16	龙薯9号 Longshu 9	黑龙江 Heilongjiang
Y5	闽薯9号 Minshu 9	福建 Fujian	Y17	龙薯14号 Longshu 14	黑龙江 Heilongjiang
Y6	闽薯6号 Minshu 6	福建 Fujian	Y18	W8	新疆 Xinjiang
Y7	闽薯7号 Minshu 7	福建 Fujian	W1	中龙薯1号 Zhonglongshu 1	黑龙江 Heilongjiang
Y8	云薯108 Yunshu 108	云南 Yunnan	P1	闽彩薯2号 Mincaishu 2	福建 Fujian
Y9	云薯109 Yunshu 109	云南 Yunnan	P2	闽彩薯3号 Mincaishu 3	福建 Fujian
Y10	天薯10号 Tianshu 10	甘肃 Gansu	P3	华颂66 Huasong 66	内蒙古 Inner Mongolia
Y11	陇薯7号 Longshu 7	甘肃 Gansu	R1	红美 Hongmei	内蒙古 Inner Mongolia
Y12	N143	北京 Beijing	R2	红玫瑰 Hongmeigui	山东 Shandong

参数 Parameter	F	平均值 Mean	标准差 SD	变幅 Range	变异系数/% CV	广义遗传力/% h²
P_n	11.51^**	17.50	2.57	13.06 ~ 21.87	14.69	77.15
G_s	6.84^**	0.39	0.10	0.24 ~ 0.60	25.18	68.42
C_i	3.51^**	280.15	23.59	235.12 ~ 327.76	8.42	11.95
T_r	5.62^**	5.08	1.02	3.47 ~ 6.95	20.02	60.60
CE	12.76^**	0.06	0.01	0.04 ~ 0.08	16.83	79.90
L_s	2.56^**	0.28	0.07	0.16 ~ 0.47	25.21	34.15
iWUE	7.08^**	46.74	10.28	29.41 ~ 70.77	21.99	66.99
SPAD	16.31^**	38.57	4.25	31.73 ~ 48.83	11.01	83.69

参数 Parameter	F	平均值 Mean	标准差 SD	变幅 Range	变异系数/% CV	广义遗传力/% h²
P_n	11.51^**	17.50	2.57	13.06 ~ 21.87	14.69	77.15
G_s	6.84^**	0.39	0.10	0.24 ~ 0.60	25.18	68.42
C_i	3.51^**	280.15	23.59	235.12 ~ 327.76	8.42	11.95
T_r	5.62^**	5.08	1.02	3.47 ~ 6.95	20.02	60.60
CE	12.76^**	0.06	0.01	0.04 ~ 0.08	16.83	79.90
L_s	2.56^**	0.28	0.07	0.16 ~ 0.47	25.21	34.15
iWUE	7.08^**	46.74	10.28	29.41 ~ 70.77	21.99	66.99
SPAD	16.31^**	38.57	4.25	31.73 ~ 48.83	11.01	83.69

参数 Parameter	P_n	G_S	C_i	T_r	CE	L_s	iWUE	SPAD
P_n	1
G_S	-0.527^**	1
C_i	-0.074	0.415^**	1
T_r	0.477^**	0.580^**	0.164	1
CE	0.835^**	0.194	-0.602^**	0.295^*	1
L_s	-0.161	-0.495^**	-0.488^**	-0.362^**	0.144	1
iWUE	-0.034	-0.823^**	-0.600^**	-0.388^**	0.300^*	0.523^**	1
SPAD	0.697^**	0.367^**	-0.053	0.340^**	0.574^**	-0.084	-0.023	1

Screening for Genetic Variation in Photosynthesis and High Photosynthetic Efficiency Germplasm in Potato

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指标 Parameters	主成分 Principal component
指标 Parameters	PC1/%	PC2/%
净光合速率 P_n	0.752	0.591
气孔导度 G_s	0.929	-0.237
胞间CO₂浓度 C_i	0.265	-0.853
蒸腾速率 T_r	0.765	0.156
瞬时羧化效率 CE	0.475	0.857
气孔限制值 L_s	-0.704	0.549
内禀水分利用率 iWUE	-0.635	0.701
SPAD	0.636	0.483
特征值 Eigenvalue	3.611	2.920
贡献率/% Contribution rate	45.135	36.494
累计贡献率/% Cumulative contribution rate	45.135	81.629

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