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

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...

AI Technical Summary

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