QTL mapping for plant height and fruit branch number based on RIL population of upland cotton  

作　　者：LIU Ruixian XIAO Xianghui GONG Juwu LI Junwen ZHANG Zhen LIU Aiying LU Quanwei SHANG Haihong SHI Yuzhen GE Qun IQBAL Muhammad Sajid CHEN Quanjia YUAN Youlu GONG Wankui 

机构地区：[1]State Key Laboratory of Cott on Biology/Institute of Cotton Research,Chinese Academy of Agricultural Sciences,Anyang 455000,Henan,China [2]Department of Agronomy/Key Laboratory of Agriculture Biological Technology,Xinjimng Agriculture University,Urumqi 830052,China [3]School of Biotechnology and Food Engineering,Anyang Institute of Techndogy,Anyang 455000,Henan,China

出　　处：《Journal of Cotton Research》2020年第1期54-62,共9页棉花研究（英文）

基　　金：funded by the National Key R&D Program of China(2017YFD0101600;2016YFD0100505);the Fundamental Research Funds for Central Research Institutes(Y2017JC48);the Natural Science Foundation of China(31371668,31471538)。

摘　　要：Background:Plant height(PH)and fruit branch number(FBN)are important traits for improving yield and mechanical harvesting of cotton.In order to identify genes of PH and FBN in cotton germplasms to develop superior cultivars,quantitative trait loci(QTLs)for these traits were detected based on the phenotypic evaluation data in nine environments across four locations and 4 years and a previously reported genetic linkage map of an recombinant inbred line(RIL)population of upland cotton.Results:In total,53 QTLs of PH and FBN,were identified on 21 chromosomes of the cotton genome except chromosomes c02,c09-c11,and c22.For PH,27 QTLs explaining 3.81%–8.54%proportions of phenotypic variance were identified on 18 chromosomes except c02,c08-c12,c15,and c22.For FBN,26 QTLs explaining 3.23%–11.00%proportions of phenotypic variance were identified on 16 chromosomes except c02-c03,c06,c09-c11,c17,c22-c23,and c25.Eight QTLs were simultaneously identified in at least two environments.Three QTL clusters containing seven QTLs were identified on three chromosomes(c01,c18 and c21).Eleven QTLs were the same as previously reported ones,while the rest were newly identified.Conclusions:The QTLs and QTL clusters identified in the current study will be helpful to further understand the genetic mechanism of PH and FBN development of cotton and will enhance the development of excellent cultivars for mechanical managements in cotton production.

关 键 词：UPLAND cotton RIL population Agronomic traits QTL Plant height FRUITING branch NUMBER 

分 类 号：S562[农业科学—作物学]