Upland Cotton Germplasms: Genetic Diversity Analysis of Main Yield and Fiber Quality Traits

doi:10.11924/j.issn.1000-6850.casb2022-0308

Abstract

Abstract:

In order to improve the utilization efficiency of cotton germplasm resources and increase the genetic diversity of backbone parents, genetic diversity analysis, correlation analysis, principal component analysis and cluster analysis were conducted on 114 germplasm materials. The coefficient of variation (CV) of lint percentage, single boll weight and micronaire were relatively large, and the CV of fiber uniformity was the smallest. The genetic diversity index of seed index was the largest, and that of fiber elongation rate was the smallest. The cumulative contribution rate of the first three factors of principal component analysis reached 83.91%. Single boll weight was significantly positively correlated with lint percentage and seed index, lint percentage was significantly negatively correlated with seed index, and fiber quality traits were positively correlated with each other. Seed index was mainly negatively correlated with fiber quality, and single boll weight and lint percentage were significantly positively correlated with fiber quality. The tested materials were divided into 3 groups by cluster analysis. Group I was mainly colored cotton varieties. Group II was materials with excellent fiber quality and common yield characters. Group III showed better comprehensive performance of yield and fiber quality. This study defined typical characteristics of different upland cotton material types, and provided certain reference for the efficient utilization of germplasm materials and the combination of parents.

Key words: upland cotton, germplasms, genetic diversity, correlation analysis, principal component analysis, cluster analysis

JIA Xiaoyun, ZHAO Hongxia, ZHU Jijie, WANG Guoyin, LI Miao, WANG Shijie. Upland Cotton Germplasms: Genetic Diversity Analysis of Main Yield and Fiber Quality Traits[J]. Chinese Agricultural Science Bulletin, 2023, 39(6): 35-40.

Figures/Tables 5

References 20

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性状	最大值	最小值	平均值	峰度	偏度	标准差	变异系数/%	遗传多样性指数
衣分/%	47.95	18.49	40.61	7.00	-2.19	4.76	11.72	1.78
单铃重/g	6.97	4.22	5.49	-0.41	0.37	0.64	11.61	2.01
子指/g	13.65	9.40	11.19	-0.36	0.31	0.95	8.47	2.05
纤维长度/mm	33.65	22.15	29.75	4.93	-1.83	1.85	6.21	1.76
比强度/(cN/tex)	37.40	23.20	31.36	1.78	-0.98	2.56	8.16	1.90
马克隆值	5.85	3.00	4.84	1.32	-0.96	0.54	11.26	1.94
伸长率/%	7.00	6.00	6.70	6.23	-1.95	0.15	2.19	1.48
整齐度/%	86.70	77.00	84.57	8.86	-2.15	1.36	1.61	1.83

性状	最大值	最小值	平均值	峰度	偏度	标准差	变异系数/%	遗传多样性指数
衣分/%	47.95	18.49	40.61	7.00	-2.19	4.76	11.72	1.78
单铃重/g	6.97	4.22	5.49	-0.41	0.37	0.64	11.61	2.01
子指/g	13.65	9.40	11.19	-0.36	0.31	0.95	8.47	2.05
纤维长度/mm	33.65	22.15	29.75	4.93	-1.83	1.85	6.21	1.76
比强度/(cN/tex)	37.40	23.20	31.36	1.78	-0.98	2.56	8.16	1.90
马克隆值	5.85	3.00	4.84	1.32	-0.96	0.54	11.26	1.94
伸长率/%	7.00	6.00	6.70	6.23	-1.95	0.15	2.19	1.48
整齐度/%	86.70	77.00	84.57	8.86	-2.15	1.36	1.61	1.83

性状	单铃重	子指	纤维长度	比强度	马克隆值	伸长率	整齐度
衣	0.41^**	-0.47^**	0.51^**	0.38^**	0.72^**	0.62^**	0.40^**
单铃重		0.30^**	0.21^*	0.09	0.53^**	0.29^**	0.24^*
子指			-0.08	0.00	-0.27^**	-0.12	-0.06
纤维长度				0.86^**	0.26^**	0.81^**	0.56^**
比强度					0.16	0.73^**	0.54^**
马克隆值						0.42^**	0.34^**
伸长率							0.62^**

性状	单铃重	子指	纤维长度	比强度	马克隆值	伸长率	整齐度
衣	0.41^**	-0.47^**	0.51^**	0.38^**	0.72^**	0.62^**	0.40^**
单铃重		0.30^**	0.21^*	0.09	0.53^**	0.29^**	0.24^*
子指			-0.08	0.00	-0.27^**	-0.12	-0.06
纤维长度				0.86^**	0.26^**	0.81^**	0.56^**
比强度					0.16	0.73^**	0.54^**
马克隆值						0.42^**	0.34^**
伸长率							0.62^**

性状	因子1	因子2	因子3
衣分	0.80	-0.48	-0.14
单铃重	0.44	-0.36	0.76
子指	-0.22	0.46	0.82
纤维长度	0.85	0.39	-0.08
比强度	0.76	0.53	-0.09
马克隆值	0.63	-0.65	0.15
伸长率	0.90	0.19	-0.03
整齐度	0.72	0.19	0.04
特征值	3.90	1.50	1.32
贡献率/%	48.76	18.71	16.44
累计贡献率/%	48.76	67.47	83.91