Research progress in molecular marker positioning of wheat powdery mildew resistance gene

A powdery mildew resistance gene and gene locus technology, applied in the field of molecular biology, can solve problems such as loss of resistance of production varieties

Inactive Publication Date: 2010-06-16
朱玉丽
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Problems solved by technology

Wheat powdery mildew has the characteristics of many small species, rapid variation, long infection period, airflow transmission, wide adaptability, etc. The continuous emergence of new small species often leads to loss of resistance of produced varieties

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Embodiment Construction

[0044] 1. Wheat powdery mildew resistance gene and its molecular markers

[0045] 1.1 Resistance inheritance, source and chromosome location of wheat powdery mildew resistance gene

[0046] The resistance of wheat to powdery mildew can be divided into two types, that is, quality resistance controlled by major genes and quantitative resistance controlled by minor polygenes. Quality resistance is controlled by dominant or recessive single genes. Most of the reported powdery mildew resistance genes are dominant, and only Pm5 from cultivated emmer wheat and Pm26 from wild emmer wheat are recessive (Rong et al., 2000 Euphytica 115:121-126). Among the unnamed powdery mildew resistance genes, some are recessive. Robe and Doussinault (1995, Mol Gen Genet 246:327-333) found that an important disease-resistant line RE714 in France contained a recessive disease-resistant gene MLRE in addition to the disease-resistant gene Pm4b through the identification of detached leaves at the seedli...

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Abstract

The invention discloses research progress in molecular marker positioning of wheat powdery mildew resistance gene. Selective breeding of disease-resistant varieties is a safe, economical and effective measure for preventing and controlling wheat powdery mildew by taking various resistance sources into consideration. The wheat powdery mildew has the characteristics of plenty microspecies, rapid variation, long infection period, air flow propagation, wide application range, and the like. New microspecies which continuously turn up and often cause the loss of resistance of production varieties. Therefore, molecular markers of disease-resistant genes are established, and the markers are used for aiding in selection to accumulate disease-resistant genes and create new resistance sources so that the important significance for realizing durable disease resistance to the wheat powdery mildew can be developed.

Description

technical field [0001] Research progress on molecular marker mapping of wheat powdery mildew resistance gene, which belongs to the field of molecular biology. Background technique [0002] Wheat powdery mildew is a fungal disease caused by wheat powdery mildew (Erysiphe graminis.f.sp tritici). Bennett, 1984, Plant Pathol 33:279-300; Miranda et al., 2006, Theor Appl Genet 113:1497-1504). Since the 1960s, with the popularization of dwarf and semi-dwarf varieties of wheat, the increase of nitrogen fertilizer application, the damage of powdery mildew has become more and more serious. and a major obstacle to high productivity. According to statistics, the yield loss caused by wheat powdery mildew is generally 5-10%, and it can be as high as 50% when it occurs seriously, or even extinction. For example, in 1990, my country's wheat powdery mildew damage area reached 180 million mu, and the yield loss reached 3.2 billion kilograms (Liu Wancai, Shao Zhenrun, 1998, Plant Protection...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C12Q1/68
Inventor 朱玉丽
Owner 朱玉丽
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