科研之友
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摘要
Chinese landraces of wheat (Triticum aestivum L. em Thell.) have had significant contributions not only to wheat production, but also to wheat improvement. Mazhamai is one of the most distinctive landraces, and has been used as a foundation parent in developing many outstanding improved cultivars in China. The objective of this study was to determine the genetic relationships of eight wheat landraces with the name Mazhamai, collected from wheat-producing regions with various geographical and microgeographic environments using morphological and agronomical traits, the composition of their gliadins and high-molecular-weight glutenin subunits (HMW-GS) and microsatellite markers. These homonymous accessions of Mazhamai differed, to some extent in their morphological and agronomical traits, gliadin composition, and microsatellite markers, but not for the HMW-GS and similar profiles for 52 of the SSR markers. This suggests that genetic variation must have occurred during the long-term growing of the Mazhamai accessions in various geographical regions. Furthermore, microsatellite analysis also revealed that the B genome was more variable than the A and D genomes and chromosomes 2A and 2B were the most variable chromosomes among the Mazhamai accessions. However, chromosomes 1A, 1D, 2D, 5B, and 7A were conserved for the SSR loci used in the study.
- 出版日期2007-10
- 单位西北农林科技大学; 中国农业科学院
