典型文献
Fixation of hybrid sterility genes and favorable alleles of key yield-related genes with dominance contribute to the high yield of the Yongyou series of intersubspecific hybrid rice
文献摘要：
In rice,the Yongyou series of Xian-Geng intersubspecific hybrids have excellent production performance,as shown by their extremely high yield.However,the mechanisms underlying the success of these rice hybrids are unclear.In this study,three F2 populations are generated from three Yongyou hybrids to determine the genetic basis of the extremely high yield of intersubspecific hybrids.Genome constitution analysis reveals that the female and male parental lines belong to the Geng and Xian subspecies,respectively,although introgression of 20％of the Xian ancestry and 14％of the Geng ancestry are observed.Twenty-five percent of the hybrid genomes carries homozygous Xian or Geng fragments,which harbors hybrid sterility genes such as Sd,Sc,f5,and qS12 and favorable alleles of key yield-related genes,including NAL1,Ghd7,and Ghd8.None of the parents carries the S5+killer of the S5 killer-protector system.Compatible allele combinations of hybrid sterility genes ensure the fertility of these inter-subspecific hybrids and overcome the bottleneck in applying intersubspecific hybrids.Additive effects of favorable alleles of yield-related genes fixed in both parents enhances midparent values.Many QTLs for yield and its key component spikelets per panicle shows dominance and the net positive dominant effects lead to heterosis.These factors result in an extremely high yield of the hybrids.These findings will aid in the development of new intersubspecific rice hybrids with diverse genetic backgrounds.
文献关键词：
中图分类号：
作者姓名：
Pengfei Wang;Feixiang Qi;Honglin Yao;Xingbing Xu;Wenjun Li;Jianghu Meng;Qinglu Zhang;Weibo Xie;Yongzhong Xing
作者机构：
National Key Laboratory of Crop Genetic Improvement,Huazhong Agricultural University,Wuhan,Hubei 430070,China;Hubei Hongshan Laboratory,Wuhan,Hubei 430070,China
文献出处：
引用格式：
[1]Pengfei Wang;Feixiang Qi;Honglin Yao;Xingbing Xu;Wenjun Li;Jianghu Meng;Qinglu Zhang;Weibo Xie;Yongzhong Xing-.Fixation of hybrid sterility genes and favorable alleles of key yield-related genes with dominance contribute to the high yield of the Yongyou series of intersubspecific hybrid rice)[J].遗传学报,2022(05):448-457
A类：
intersubspecific,qS12,Ghd7,Ghd8,S5+killer,subspecific,midparent
B类：
Fixation,sterility,genes,favorable,alleles,key,yield,related,dominance,contribute,high,Yongyou,series,rice,In,Xian,Geng,hybrids,have,excellent,production,performance,shown,by,their,extremely,However,mechanisms,underlying,success,these,unclear,this,study,three,F2,populations,generated,from,determine,genetic,basis,Genome,constitution,analysis,reveals,that,female,parental,lines,belong,subspecies,respectively,although,introgression,ancestry,observed,Twenty,five,percent,genomes,carries,homozygous,fragments,which,harbors,such,Sd,Sc,f5,including,NAL1,None,parents,protector,system,Compatible,combinations,ensure,fertility,overcome,bottleneck,applying,Additive,effects,fixed,both,enhances,values,Many,QTLs,its,component,spikelets,panicle,shows,positive,dominant,lead,heterosis,These,factors,result,findings,will,aid,development,new,diverse,backgrounds
AB值：
0.479111
相似文献
机标中图分类号，由域田数据科技根据网络公开资料自动分析生成，仅供学习研究参考。
