Genomic Insights into Local Adaptation of Upland Cotton in China and Pakistan

Overview

Journal Theor Appl Genet

Publisher Springer

Specialty Genetics

Date 2024 May 19

PMID 38764078

Authors

Zegang Han

Zhanfeng Si

Mehboob-Ur Rahman

Lu He

Yiqian Li

Ali Qaiser Khan

Yun Mao

Sana Zulfiqar

Shumila Ishfaq

Muhammad Mohsan

Muhammad Atif Iqbal

Saba Zafar

Yan Hu

Tianzhen Zhang

Affiliations

Soon will be listed here.

Abstract

Different kinship and resistance to cotton leaf curl disease (CLCuD) and heat were found between upland cotton cultivars from China and Pakistan. 175 SNPs and 82 InDels loci related to yield, fiber quality, CLCuD, and heat resistance were identified. Elite alleles found in Pakistani accessions aided local adaptation to climatic condition of two countries. Adaptation of upland cotton (Gossypium hirsutum) beyond its center of origin is expected to be driven by tailoring of the genome and genes to enhance yield and quality in new ecological niches. Here, resequencing of 456 upland cotton accessions revealed two distinct kinships according to the associated country. Fiber quality and lint percentage were consistent across kinships, but resistance to cotton leaf curl disease (CLCuD) and heat was distinctly exhibited by accessions from Pakistan, illustrating highly local adaption. A total of 175 SNP and 82 InDel loci related to yield, fiber quality, CLCuD and heat resistance were identified; among them, only two overlapped between Pakistani and Chinese accessions underscoring the divergent domestication and improvement targets in each country. Loci associated with resistance alleles to leaf curl disease and high temperature were largely found in Pakistani accessions to counter these stresses prevalent in Pakistan. These results revealed that breeding activities led to the accumulation of unique alleles and helped upland cotton become adapted to the respective climatic conditions, which will contribute to elucidating the genetic mechanisms that underlie resilience traits and help develop climate-resilient cotton cultivars for use worldwide.

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