Comparative mapping of the wheat chromosome 5A Vrn-A1 region with rice and its relationship to QTL for flowering time
Comparative mapping of the wheat chromosome 5A Vrn-A1 region with rice and its relationship to QTL for flowering time
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DOI：
10.1007/s001220050872
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发表时间：
1998-07
影响因子：
5.4
通讯作者：
R. Sarma;B. Gill;T. Sasaki;G. Galiba;J. Sutka;D. Laurie;J. Snape
中科院分区：
文献类型：
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作者：
R. Sarma;B. Gill;T. Sasaki;G. Galiba;J. Sutka;D. Laurie;J. Snape
5A染色体上的春化基因Vrn-A1是决定面包小麦春/冬习性差异的主要基因。使用一组缺失系对Vrn-A1进行物理定位，将其定位于侧翼为缺失断点0.68和0.78的5A染色体区域。该间隔被证明与水稻第 3 号染色体的一个区域同源，该区域包含开花时间 QTLHd-6（之前在日本晴×Kasalath 杂交中定位）和 FLTQ1，FLTQ1 是通过分析源自“IR20”ד63-83”杂交的 78 个 F3 家族而鉴定的新 QTL。讨论了Vrn-A1 与水稻QTL 之间可能的关系。对 5A 号染色体缺失系的分析表明，存在位于缺失断点 0.56 和 0.64 之间的第二个、更接近的开花时间效应的证据。 5A染色体近端部分与水稻9号染色体同源，在‘IR20ב63-83’杂交中检测到两个QTL。还讨论了这些影响之间可能的关系。
The vernalization geneVrn-A1on chromosome 5A is the predominant gene determining the spring/winter habit difference in bread wheat.Vrn-A1was physically mapped using a set of deletion lines which located it to the region of chromosome 5A flanked by deletion breakpoints 0.68 and 0.78. This interval was shown to be homoeologous to a region of rice chromosome 3 that contains the flowering-time QTLHd-6, previously mapped in a Nipponbare×Kasalath cross, andFLTQ1, a novel QTL identified by analysis of 78 F3families derived from a cross of ‘IR20’ב63–83’. Possible relationships betweenVrn-A1and rice QTL are discussed. Analysis of the chromosome 5A deletion lines showed evidence for a second, more proximal flowering-time effect located between deletion breakpoints 0.56 and 0.64. The proximal part of chromosome 5A is homoeologous to rice chromosome 9, on which two QTL were detected in the ‘IR20ב63–83’ cross. The possible relationship between these effects is also discussed.