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Molecular Diversity and Association Analysis of Drought and Salt Tolerance in Gossypium hirsutum L. Germplasm
- Source :
- Journal of Integrative Agriculture, Vol 13, Iss 9, Pp 1845-1853 (2014)
- Publication Year :
- 2014
- Publisher :
- Elsevier, 2014.
-
Abstract
- 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 ΔK 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.
- Subjects :
- Germplasm
Linkage disequilibrium
Agriculture (General)
cotton germplasm
Plant Science
Quantitative trait locus
Biology
Biochemistry
S1-972
Food Animals
Genetic variation
Botany
Association mapping
Genetic association
Genetics
linkage disequilibrium (LD)
Genetic diversity
Ecology
fungi
food and beverages
genetic diversity
simple sequence repeats (SSR) markers
association analysis
Microsatellite
Animal Science and Zoology
Agronomy and Crop Science
Food Science
Subjects
Details
- Language :
- English
- ISSN :
- 20953119
- Volume :
- 13
- Issue :
- 9
- Database :
- OpenAIRE
- Journal :
- Journal of Integrative Agriculture
- Accession number :
- edsair.doi.dedup.....b031e0fdb99d049504e306c0b58c7e53