Breeding method of disease-resistant fragrant Guangdong silky rice variety

Abstract

The invention provides a breeding method of a disease-resistant fragrant Guangdong silky rice variety, which comprises the following steps: (1) hybridizing a donor parent and a receptor parent to obtain F1-generation seeds; planting the F1 generation to obtain F2 generation seeds; (2) planting more than or equal to 1000 single plants in the F2-generation seeds, and selecting target single plants to obtain single plant seeds; (3) planting 100 single plant seeds according to plant lines, carrying out natural rice blast resistance identification and bacterial blight patient industrial inoculation in a rice blast area, screening the plant lines with good resistance to carry out line selection, selecting a target single plant to carry out resistance gene Pi2 and fragrance gene fgr detection, and retaining the single plant with positive resistance gene Pi2 and fragrance gene fgr; and (4) carrying out field planting line selection on the single plants with positive double genes of the resistance gene Pi2 and the fragrance gene fgr, carrying out resistance identification, and selecting a target rice variety to obtain the disease-resistant fragrant Guangdong rice variety. According to the invention, the target strain can be bred in a short time, the breeding effect is remarkable, and the method can adapt to a rapidly-developed farming mode.

Description

technical field [0001] The invention belongs to the technical field of breeding, and in particular relates to a method for breeding a disease-resistant fragrant-type Guangdong silk seedling rice variety. Background technique [0002] Guangdong Simiao rice is a special high-quality aromatic rice variety with Guangdong regional characteristics. The slender and fragrant rice grains are the distinctive features of the new Guangdong silk seedling rice that distinguishes it from other rice. With the rapid improvement of living standards, people's demand for high-quality silk seedling rice is also constantly expanding. However, although traditional Simiao rice (such as Zengcheng Simiao, Meixiangzhan No. 2, Ivory Xiangzhan, etc.) has good quality, its yield, disease resistance, and lodging resistance are insufficient, and it is difficult to adapt to the rapidly developing cultivation mode. [0003] The traditional hybrid selection method takes a long time to improve disease resista...

AI Technical Summary

Problems solved by technology

[0004] The embodiments of the present invention provide a method for breeding disease-resistant and fragrant Guangdong silk seedling rice varieties, aiming to solve the current problems of Guangdong silk seedling rice with low yield, weak disease resistance, and poor comprehensive agronomic traits.