Breeding method of distant hybridization rice

Abstract

The invention belongs to the technical field of breeding of hybrid rice, and provides a breeding method of distant hybridization rice. The breeding method includes the steps that Cambodian rice is castrated, the castrated Cambodian rice and high-quality rice with low-temperature-resistant and cold-leaching-resistant characters are hybridized, and a rice female parent material is obtained; the ricefemale part material and weak-base rice are re-hybridized, and distant hybridization core seeds are obtained; the distant hybridization core seeds are bred through a first series, and the distant hybridization rice is obtained. The Cambodian rice and the high-quality rice with the low-temperature-resistant and cold-leaching-resistant characters are hybridized, then the offspring and the weak-baserice are re-hybridized for seed production, the characters of the rice are synthesized, and the distant hybridization rice has the characteristics of low temperature resistance, cold leaching resistance, drought resistance, waterlogging resistance, lodging resistance, weak base and high yield. Meanwhile, as the produced distant hybridization rice has the characteristics, the resistance of the distant hybridization rice in the seed production and breeding process is enhanced, the requirements and conditions of seed production environments are lowered, and the seed production cost is reduced.

Description

technical field

[0001] The invention belongs to the technical field of hybrid rice breeding, and in particular relates to a breeding method of distant hybrid rice. Background technique

[0002] Hybrid rice refers to the selection of two rice varieties that have certain differences in genetics and can complement each other in their excellent traits to produce hybrids with heterosis. Heterosis is a common phenomenon in the biological world, and using heterosis to improve crop yield and quality is one of the main achievements of modern agricultural science.

[0003] Rice has obvious heterosis phenomenon, which is mainly manifested in vigorous growth, well-developed root system, large ears and many grains, and strong stress resistance. Therefore, it has always been the dream of breeders to use the heterosis of rice to greatly increase rice yield.

[0004] However, the comprehensive and better utilization of rice with different excellent agronomic traits has not been effectively...

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