Shoupu He
Haris Ahmed
Zareen Sarfraz
Yinhua Jia
Hongge Li
Gaofei Sun
Muhammad Shahid Iqbal
Zhaoe Pan
Xiongming Du
a State Key Laboratory of Cotton Biology, Institute of Cotton Research, Chinese Academy of Agricultural Sciences, Anyang, Henan 455000, China;
b School of Agricultural Sciences, Zhengzhou University, Zhengzhou, Henan 450001, China;
c Cotton Research Institute, Ayub Agricultural Research Institute, Multan 60000, Pakistan;
d Research Base, State Key Laboratory of Cotton Biology, Zhengzhou University, Zhengzhou, Henan 450001, China
Funds: This work was supported by funding from the National Key Technology R&D Program, the Ministry of Science and Technology (2016YFD0100203, 2017FD0101601), and the crop germplasm conservation program of the ministry of Agriculture (2015NWB039).
Received Date: 2020-10-30
Accepted Date:2021-04-11
Rev Recd Date:2021-04-07
Publish Date:2021-06-20
Abstract
Abstract
Wild progenitors are an excellent source for strengthening the genetic basis and accumulation of desirable variation lost because of directional selection and adaptation in modern cultivars. Here, we re-evaluate a landrace of Gossypium hirsutum, formerly known as Gossypium purpurascens. Our study seeks to understand the genomic structure, variation, and breeding potential of this landrace, providing potential insights into the biogeographic history and genomic changes likely associated with domestication. A core set of accessions, including current varieties, obsolete accessions, G. purpurascens, and other geographical landraces, are subjected to genotyping along with multilocation phenotyping. Population fixation statistics suggests a marked differentiation between G. purpurascens and three other groups, emphasizing the divergent genomic behavior of G. purpurascens. Phylogenetic analysis establishes the primitive nature of G. purpurascens, identifying it as a vital source of functional variation, the inclusion of which in the upland cotton (cultivated G. hirsutum) gene pool may broaden the genetic basis of modern cultivars. Genome-wide association results indicate multiple loci associated with domestication regions corresponding to flowering and fiber quality. Moreover, the conserved nature of G. purpurascens can also provide insights into the evolutionary process of G. hirsutum.Keywords: Gossypium purpurascens,
Upland cotton,
Genetic differentiation,
G. hirsutum,
Domestication
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