Molecular Diversity and Association Analysis of Drought and Salt Tolerance in Gossypium hirsutum L. Germplasm

文献类型： 外文期刊

第一作者： JIA Yin-hua

作者： JIA Yin-hua;SUN Jun-ling;WANG Xi-wen;ZHOU Zhong-li;PAN Zao-e;HE Shou-pu;PANG Bao-yin;WANG Li-ru;DU Xiong-ming

作者机构：

关键词： cotton germplasm;genetic diversity;simple sequence repeats (SSR) markers;linkage disequilibrium (LD);association analysis

期刊名称：JOURNAL OF INTEGRATIVE AGRICULTURE （ 影响因子：2.848； 五年影响因子：2.979 ）

ISSN： 2095-3119

年卷期： 2014 年 13 卷 9 期

页码：

收录情况： SCI

摘要： Association mapping is a useful tool for the detection of genes selected during plant domestication based on their linkage disequilibrium (LD). This study was carried out to estimate genetic diversity, population structure and the extent of LD to develop an association framework in order to identify genetic variations associated with drought and salt tolerance traits. 106 microsatellite marker primer pairs were used in 323 Gossypium hirsutum germplasms which were grown in the drought shed and salt pond for evaluation. Polymorphism (PIC=0.53) was found, and three groups were detected (K=3) with the second likelihood Delta K using STRUCTURE software. LD decay rates were estimated to be 13-15 cM at r(2)>= 0.20. Significant associations between polymorphic markers and drought and salt tolerance traits were observed using the general linear model (GLM) and mixed linear model (MLM) (P <= 0.01). The results also demonstrated that association mapping within the population structure as well as stratification existing in cotton germplasm resources could complement and enhance quantitative trait loci (QTLs) information for marker-assisted selection.

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