Deletion polymorphism in wheat chromosome regions with contrasting recombination rates

被引：49

作者：

Dvorak, J ^{[1
]}

Yang, ZL ^{[1
]}

You, FM ^{[1
]}

Luo, MC ^{[1
]}

机构：

[1] Univ Calif Davis, Dept Plant Sci, Davis, CA 95616 USA

来源：

GENETICS | 2004年 / 168卷 / 03期

关键词：

D O I：

10.1534/genetics.103.024927

中图分类号：

Q3 [遗传学];

学科分类号：

071007 ; 090102 ;

摘要：

Polymorphism for deletions was investigated in 1027 lines of tetraploid and hexaploid wheat and 420 lines of wheat diploid ancestors. A total of 26 deletions originating during the evolution of polyploid wheat were discovered among 155 investigated loci. Wheat chromosomes were divided into a proximal, low-recombination interval containing 69 loci and a distal, high-recombination interval containing 86 loci. A total of 23 deletions involved loci in the distal, high-recombination interval and only 3 involved loci in the proximal, low-recombination interval. The rates of DNA loss differed by several orders of magnitude in the two intervals. The rate of diploidization of polyploid wheat by deletions was estimated and was shown to have proceeded faster in the distal, high-recombination interval than in the proximal, low-recombination interval.

引用

页码：1665 / 1675

页数：11

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