Rice Bacterial Blight Resistance Varieties in Yunnan Plateau

The key project undertaken by the Institute of Biotechnology and Germplasm Resources of Yunnan Academy of Agricultural Sciences--"Application of Rice Bacterial Blight Resistance Genes in Plateau Rice Breeding" was recently identified in Kunming by provincial experts. In this study, the bacterial blight resistance gene was successfully introduced into the new plateau japonica rice line, and a new plateau japonica rice line with disease resistance and high quality and high yield characteristics was selected and bred. Among them, 8 new lines have passed the expert field assessment, 1 A new product line entered the 2005 Yunnan regional trial. Bacterial blight of rice is a kind of gram-negative bacteria caused by the rice in the world caused by single strains of rice, is also one of the three major diseases of rice in China. The disease is very explosive and the epidemic is fast. The incidence of rice bacterial blight in Yunnan is as high as 1 million mu each year, accounting for about 8% of the province's rice planting area. The average annual yield can be reduced by about 20%. There are two main ways to control bacterial blight in rice: First, use pesticides; second, use resistant genes to breed resistant varieties. Since there are no bacterial blight resistance varieties in Yunnan plateau japonica rice, the japonica rice varieties outside the province cannot adapt to the ecological characteristics of the plateau. To solve this problem, it is necessary to breed a plateau japonica rice variety resistant to bacterial blight. This study aimed at the lack of resistance to bacterial blight varieties and germplasm in plateau japonica rice production. Using the disease-resistant genes that have been excavated and located, combined with molecular biology techniques, the bacterial blight resistance gene was introduced into the plateau japonica rice new lines. In the germplasm (or germplasm), a series of plateau japonica rice lines that are resistant to disease and have high quality and high yield characteristics are selected and bred after continuous selection and backcrossing. It is understood that this scientific and technological achievement has important reference and promotion significance for the prevention and control of rice bacterial blight in other plateau regions.

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