Location of the Ph1 locus in the metaphase chromosome map and the linkage map of the 5Bq arm of wheat

R. Jampates, J. Dvorak
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引用次数: 35

Abstract

Heterogenetic chromosome pairing in wheat is prevented by the Ph1 locus on the q (=L) arm of chromosome 5B. Two durum wheat cv. Cappelli structural mutants with rearranged 5Bq chromosome arms were investigated to determine the location of the Ph1 locus in the metaphase map and the linkage map of the arm. One of the mutants, Cap5Bq−, has a deletion of subregion 5Bq12.3 between C-bands 5Bq12.2 and 5Bq21 and the other one, Cap5Bq+, has the same subregion duplicated. Each mutant and standard cv. Cappelli were crossed with Aegilops kotschyi, Ae. ovata, Ae. cylindrica, Ae. ventricosa, Ae. juvenalis, and "Ae. crassa 6x." Hybrids involving Cap5Bq− had higher levels of chromosome pairing than those involving cv. Cappelli, whereas those involving Cap5Bq+ had lower levels of pairing than those involving cv. Cappelli. Cap5Bq− was crossed with cv. Cappelli and the F1 was hybridized with Ae. kotschyi and Ae. ventricosa. All hybrids with the 5Bq− chromosome had a higher level of chromosome pairing than those with the st...
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小麦中期染色体图谱和5Bq臂连锁图谱中Ph1位点的定位
小麦5B染色体q (=L)臂上的Ph1位点阻止了异源染色体配对。两个硬粒小麦cv。研究了5Bq染色体臂重排的Cappelli结构突变体,确定了Ph1位点在中期图谱和臂连锁图谱中的位置。其中一个突变体Cap5Bq−在5Bq12.2和5Bq21之间缺失了5Bq12.3亚区,而另一个突变体Cap5Bq+则重复了相同的亚区。每个突变体和标准cv。结果表明:卡佩利与黄颡鱼、黄颡鱼、黄颡鱼杂交;ovata, Ae。cylindrica, Ae。紫Ae。和“伊蚊”。菌6 x”。涉及Cap5Bq−的杂交种的染色体配对水平高于涉及cv的杂交种。Cappelli,而涉及Cap5Bq+的配对水平低于涉及cv的配对水平。卡佩里。将Cap5Bq−与cv杂交。Cappelli和F1与Ae杂交。kotschyi和Ae。紫。所有5Bq−染色体杂交种的染色体配对水平均高于5Bq−染色体杂交种。
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