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Association analysis of fiber quality traits and exploration of elite alleles in Upland cotton cultivars/accessions ( Gossypium hirsutum L.)
Author(s) -
Cai Caiping,
Ye Wenxue,
Zhang Tianzhen,
Guo Wangzhen
Publication year - 2014
Publication title -
journal of integrative plant biology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.734
H-Index - 83
eISSN - 1744-7909
pISSN - 1672-9072
DOI - 10.1111/jipb.12124
Subject(s) - germplasm , biology , allele , cultivar , trait , quantitative trait locus , gossypium , microsatellite , association mapping , agronomy , elite , genotype , microbiology and biotechnology , genetics , gene , single nucleotide polymorphism , computer science , programming language , politics , law , political science
Exploring the elite alleles and germplasm accessions related to fiber quality traits will accelerate the breeding of cotton for fiber quality improvement. In this study, 99 Gossypium hirsutum L. accessions with diverse origins were used to perform association analysis of fiber quality traits using 97 polymorphic microsatellite marker primer pairs. A total of 107 significant marker‐trait associations were detected for three fiber quality traits under three different environments, with 70 detected in two or three environments and 37 detected in only one environment. Among the 70 significant marker‐trait associations, 52.86% were reported previously, implying that these are stable loci for target traits. Furthermore, we detected a large number of elite alleles associated simultaneously with two or three traits. These elite alleles were mainly from accessions collected in China, introduced to China from the United States, or rare alleles with a frequency of less than 5%. No one cultivar contained more than half of the elite alleles, but 10 accessions were collected from China and the two introduced from the United States did contain more than half of these alleles. Therefore, there is great potential for mining elite alleles from germplasm accessions for use in fiber quality improvement in modern cotton breeding.