注册 登录  
 加关注
   显示下一条  |  关闭
温馨提示!由于新浪微博认证机制调整,您的新浪微博帐号绑定已过期,请重新绑定!立即重新绑定新浪微博》  |  关闭

wangyufeng的博客

祝愿BB 健康开心快乐每一天

 
 
 

日志

 
 

Recombination frequency variation in maize as revealed by genomewide single-nucleotide polymorphisms  

2011-10-25 20:48:31|  分类: 数量遗传学 |  标签: |举报 |字号 订阅

  下载LOFTER 我的照片书  |

Abstract

Recombination frequency greatly affects selection efficiency in plant breeding. A high-density single-nucleotide polymorphism (SNP) map integrated with physical map and other molecular maps is very useful for characterizing genetic recombination variation. In this study, recombination frequency in maize was investigated through SNP linkage maps constructed with three recombinant inbred line populations. The integrated map consisted of 1443 molecular markers, including 1155 SNPs, spanning 1346 cM. A 100-fold difference in recombination frequency was observed between different chromosomal regions, ranging from an average of 0.09 cM/Mb for pericentromeric regions to 7.08 cM/Mb for telomeric regions. Recombination suppression in non-centromeric regions identified nine recombination-suppressed regions, one of which likely contained condensed heterochromatin (knobs). Recombination variation along chromosomes was highly predictable for pericentromeric and telomeric regions, but population-specific with 4.5-fold difference for the same marker interval across the three populations or specific chromosome regions because of the presence of knobs. As recombination variation can be identified and well characterized as shown in this study, the related information will facilitate future genetic studies, gene cloning and marker-assisted plant breeding.

Keywords:

  评论这张
 
阅读(814)| 评论(0)
推荐 转载

历史上的今天

在LOFTER的更多文章

评论

<#--最新日志,群博日志--> <#--推荐日志--> <#--引用记录--> <#--博主推荐--> <#--随机阅读--> <#--首页推荐--> <#--历史上的今天--> <#--被推荐日志--> <#--上一篇,下一篇--> <#-- 热度 --> <#-- 网易新闻广告 --> <#--右边模块结构--> <#--评论模块结构--> <#--引用模块结构--> <#--博主发起的投票-->
 
 
 
 
 
 
 
 
 
 
 
 
 
 

页脚

网易公司版权所有 ©1997-2017