一种新的抗条锈病基因转介至六倍体小麦(Triticum aestivum)

IF 0.3 4区农林科学 Q4 PLANT SCIENCES

Phytoprotection Pub Date : 2010-06-28 DOI:10.7202/044023AR

P. Luo, Xueyun Hu, Z. Chang, M. Zhang, H. Zhang, Z. Ren

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引用次数: 16

摘要

小麦条锈病(Puccinia striiforis f. sp. tritici)在中国流行，CYR31和CYR32对许多小麦条锈病抗性基因(Yr基因)具有毒力。为了扩大对CYR31和CYR32有效抗性的有效性，将中间小麦(Thinopyrum intermedium)的条锈病抗性转移到普通小麦(Triticum aestivum)上。将敏感小麦品种CM107与宽杂交品种Taiyuan768/Thinopyrum intermedium//76衍生的两倍体TAI7047进行杂交。由该杂交组合产生的两个小麦品系YU24和YU25对CYR31和CYR32具有抗性。系谱分析表明，育24和育25抗条锈病的基因来源于中间麦草。遗传分析表明，小麦对条锈病的抗性是由一个显性基因控制的。等位基因试验表明，玉24和玉25的抗性基因完全相同。新基因暂时被命名为YrYU25。SSR和RAPD分析表明，YrYU25是通过隐性转位引入普通小麦的。

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A new stripe rust resistance gene transferred from Thinopyrum intermedium to hexaploid wheat (Triticum aestivum)

Wheat stripe rust (Puccinia striiforis f. sp. tritici) races CYR31 and CYR32, prevalent in China, are virulent to many wheat stripe rust resistance genes (Yr genes). To expand the availability of effective resistance to CYR31 and CYR32, stripe rust resistance was transferred from intermediate wheatgrass (Thinopyrum intermedium) to common wheat (Triticum aestivum). The susceptible wheat cultivar CM107 was crossed with amphiploid TAI7047, derived from the wide cross Taiyuan768/Thinopyrum intermedium//76(64). Two wheat lines originating from the cross, YU24 and YU25, were resistant to CYR31 and CYR32. Pedigree analysis showed that the resistance to stripe rust in YU24 and YU25 originated from intermediate wheatgrass. Genetic analyses indicated that the resistance to stripe rust is controlled by a single dominant gene. Allelic tests determined that the resistance gene(s) in YU24 and YU25 are identical. The new gene has temporarily been designated as YrYU25. SSR and RAPD analyses showed that YrYU25 was introduced by cryptic translocation into common wheat.

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来源期刊

Phytoprotection 生物-植物科学

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