,The HuangZaoSi Maize Genome Provides Insights into Genomic Variation and Improvement History of Mai

• 作 者: Chunhui Li Wei Song Yingfeng LUO Shenghan Gao Ruyang Zhang Zi Shi Xiaqing Wang Ronghuan Wang Fengge Wang Jidong Wang Yanxin Zhao Aiguo Su Shuai Wang Xin Li Meijie Luo Shuaishuai Wang Yunxia Zhang Jian
• 机 构: Maize Research Center, Beijing Academy of Agriculture & Forestry Sciences(BAAFS), Beijing Key Labora
• 出 处: 分子植物（英文版）
• 发表日期: 2019年3期
• 关键词: HZS comparative genomic analysis tandem duplication pedigree analysis identity-b

Maize is a globally important crop that was a classic model plant for genetic studies.Here,we report a 2.2 Gb draft genome sequence of an elite maize line,HuangZaoSi (HZS).Hybrids bred from HZS-improved lines (HILs) are planted in more than 60％ of maize fields in China.Proteome clustering of six completed sequenced maize genomes show that 638 proteins fall into 264 HZS-specific gene families with the majority of contributions from tandem duplication events.Resequencing and comparative analysis of 40 HZS-related lines reveals the breeding history of HILs.More than 60％ of identified selective sweeps were clustered in identity-by-descent conserved regions,and yield-related genes/QTLs were enriched in HZS characteristic selected regions.Furthermore,we demonstrated that HZS-specific family genes were not uniformly distributed in the genome but enriched in improvement/function-related genomic regions.This study provides an important and novel resource for maize genome research and expands our knowledge on the breadth of genomic variation and improvement history of maize.