普通小麦99-2439中的白粉病抗性遗传 |
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引用本文: | 牛吉山,张丽娜,庄丽芳,王映红.普通小麦99-2439中的白粉病抗性遗传[J].植物学通报,2005,22(4):439-444. |
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作者姓名: | 牛吉山 张丽娜 庄丽芳 王映红 |
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作者单位: | 河南农业大学国家小麦工程技术研究中心 郑州450002
(牛吉山),西北师范大学生命科学学院 兰州730070
(张丽娜),南京农业大学作物遗传与种质创新国家重点实验室 南京210095
(庄丽芳),河南农业大学国家小麦工程技术研究中心 郑州450002(王映红) |
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基金项目: | 河南省杰出青年科学基金,河南省科技厅科技攻关项目 |
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摘 要: | 普通冬小麦品系99-2439在郑州连续4年对田间白粉菌(Blumeria graminis sp.tritici)表现高抗,但其抗性基因来源不清.通过染色体C-分带和IRS染色体特异性SCAR标记鉴定,表明它是一个小麦-黑麦(Triticum aestivum-Secale cereale)lBL/1RS异易位系.通过对中国春×99-2439杂交F2代分离群体抗性鉴定和1RS染色体臂检测结果分析,证明该抗病基因不在1RS染色体臂上.用单孢小麦白粉菌分离株对其抗性遗传进行研究,结果表明,99-2439的白粉病抗性由一对小种专化、隐性抗病基因控制.由于携带Pm5a的Hope/8Cc对中国的21个小麦白粉菌分离菌株均高度感病,而99-2439高抗混和白粉菌和5个单孢分离菌株,所以,99-2439所携带的抗白粉病基因不同于Pm5a.
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关 键 词: | 小麦 白粉病 抗性 遗传 |
收稿时间: | 2004-06-23 |
修稿时间: | 2004-12-24 |
Inheritance of the Powdery Mildew Resistance in Wheat Line 99-2439 |
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Abstract: | Common winter wheat (Triticum aestivum) line 99-2439 has shown high resistance toBlumeria graminis sp. tritici in the field in Zhengzhou for 4 years. However, the origin of itspowdery mildew resistance genes was unclear. We identified 99-2439 as a Triticum aestivum -Secale cereale 1BL/1RS alien translocation line by chromosome C-banding and 1RS-specificSCAR marker detection. Powdery mildew evaluation and 1RS detection of an F2 segregationpopulation derived from the cross between Chinese Spring wheat and line 99-2439 demonstratedthat the powdery mildew resistance gene was located on the 1RS chromosome arm. Inheritancestudy using a single spore isolate of B. graminis showed that line 99-2439 harbored a race-specific recessive powdery mildew resistance gene. Because 99-2439 was highly resistant tomixed fungi and 5 single spore isolates of B. graminis, the powdery mildew resistance gene of 99-2439 was different from Pm5a of Hope/8Cc, which was highly susceptible to all 21 isolates of B.graminis in China. |
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Keywords: | Wheat (Triticum aestivum) Powdery mildew Resistance Inheritance |
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