The inhibiting effect of 1.4 recombinant P chromosome of wheat-Agropyron cristatum addition line on the Ph gene

P chromosomes may carry a genetic system that inhibits the Ph gene in wheat. Abnormal chromosome synapsis in wheat-Agropyron cristatum addition line Ⅱ-21-2 （additional 1-4 recombinant P chromosome） was observed in this study. The results of cytogenetics and Phl gene amplification showed that the Phl...

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Bibliographic Details
Published in:Chinese science bulletin 2010 (2), p.153-157
Main Author: YANG GuoHui YANG XinMing WANG RuiHui GAO AiNong LI LiHui LIU WeiHua
Format: Article
Language:English
Subjects:
Ph基因
同源染色体
抑制作用
染色体重组
附加系
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Summary:P chromosomes may carry a genetic system that inhibits the Ph gene in wheat. Abnormal chromosome synapsis in wheat-Agropyron cristatum addition line Ⅱ-21-2 （additional 1-4 recombinant P chromosome） was observed in this study. The results of cytogenetics and Phl gene amplification showed that the Phl gene was normal and the average number of quadrivalents or hexavalents was determined to be 0.41 and 0.13, respectively, in pollen-mother cells of wheat-Agropyron cristatum addition line Ⅱ-21-2. The analysis of dual-color GISH/FISH showed that the P chromosomes were not directly involved in the composition of multivalents but could inhibit the effect of the Ph gene, leading to synapsis of wheat homoeologous chromosomes and translocation between wheat homoeologous chromosomes such as 3B-3D chromosomes. The characteristic of P chromosomes＇ promoting synapsis of wheat homoeologous chromosomes may have potential application in the genetic improvement of wheat.
ISSN:1001-6538
1861-9541
DOI:10.1007/s11434-010-0007-8