Development of a chromosomal arm map for wheat based on RFLP markers

被引：194

作者：

Anderson, J. A. ^{[1
]}

Ogihara, Y. ^{[2
]}

Sorrells, M. E. ^{[1
]}

Tanksley, S. D. ^{[1
]}

机构：

[1] Cornell Univ, Dept Plant Breeding & Biometry, Ithaca, NY 14853 USA

[2] Yokohama City Univ, Inst Biol Res, Minami Ku, Yokohama, Kanagawa 232, Japan

来源：

THEORETICAL AND APPLIED GENETICS | 1992年 / 83卷 / 08期

关键词：

Aneuploid; chromosomal map; RFLPs; Translocation; Triticum aestivum;

D O I：

10.1007/BF00232969

中图分类号：

S3 [农学（农艺学）];

学科分类号：

0901 ;

摘要：

A chromosomal arm map has been developed for common wheat (Triticum aestivum L. em. Thell.) using aneuploid stocks to locate more than 800 restriction fragments corresponding to 210 low-copy DNA clones from barley cDNA, oat cDNA, and wheat genomic libraries. The number of restriction fragments per chromosome arm correlates moderately well with relative DNA content and length of somatic chromosomes. The chromosomal arm locations of loci detected with 6 different clones support an earlier hypothesis for the occurrence of a two-step translocation (4AL to 5AL, 5AL to 7BS, and 7BS to 4AL) in the ancestral wheat genomes. In addition, 1 clone revealed the presence of a 5AL segment translocated to 4AL. Anomalies in aneuploid stocks were also observed and can be explained by intrahomoeologous recombination and polymorphisms among the stocks. We view the development of this chromosomal arm map as a complement to, rather than as a substitute for, a conventional RFLP linkage map in wheat.

引用

页码：1035 / 1043

页数：9

共 36 条

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