Genome assembly of KA105,a new resource for maize molecular breeding and genomic research  

作　　者：Ting Li Shutu Xu Jiawen Zhao Yapeng Wang Jun Zhang Xin Wei Jianzhou Qu Ruisu Yu Xinghua Zhang Chuang Ma Jiquan Xue 

机构地区：[1]The Key Laboratory of Biology and Genetic Improvement of Maize in Arid Area of Northwest Region,Northwest A&F University,Yangling 712100,Shaanxi,China [2]Maize Engineering&Technology Research Centre,College of Agronomy,Northwest A&F University,Yangling 712100,Shaanxi,China [3]State Key Laboratory of Crop Stress Biology for Arid Areas,Center of Bioinformatics,College of Life Sciences,Northwest A&F University,Yangling 712100,Shaanxi,China

出　　处：《The Crop Journal》2023年第6期1793-1804,共12页作物学报（英文版）

基　　金：the China Agriculture Research System(CARS-02-77);the Shaanxi Province Research and Development Project(2021LLRH-07);the Yangling Seed Industry Innovation Center Project(YLZY-YM-01).

摘　　要：Superior inbred lines are central to maize breeding as sources of natural variation.Although many elite lines have been sequenced,less sequencing attention has been paid to newly developed lines.We constructed a genome assembly of the elite inbred line KA105,which has recently been developed by an arti-ficial breeding population named Shaan A and has shown desirable characteristics for breeding.Its pedigree showed genetic divergence from B73 and other lines in its pedigree.Comparison with the B73 reference genome revealed extensive structural variation,58 presence/absence variation(PAV)genes,and 1023 expanded gene families,some of which may be associated with disease resistance.A network-based integrative analysis of stress-induced transcriptomes identified 13 KA105-specific PAV genes,of which eight were induced by at least one kind of stress,participating in gene modules responding to stress such as drought and southern leaf blight disease.More than 200,000 gene pairs were differentially correlated between KA105 and B73 during kernel development.The KA105 reference genome and transcriptome atlas are a resource for further germplasm improvement and surveys of maize genomic variation and gene function.

关 键 词：Genome assembly Pedigree analysis Structural variation Transcriptome atlas Differential network 

分 类 号：S513[农业科学—作物学]