Method for comprehensive screening of new improved hybrid rice combinations

Abstract

The invention discloses a comprehensive screening method for a new combination of fine hybrid rice. The steps are: 1) selection of the hybrid combination; 2) record of the initial earing stage; 3) record of rice blast; 5) Sampling and testing; 6) Evaluation of rice quality; 7) Combination screening: Comprehensive analysis of the growth period of the combination, preliminary screening Results, theoretical yield, rice blast resistance and rice quality traits were screened for combinations with good field performance, suitable plant height and growth period, no panicle blast, and good rice quality. This method is systematic in breeding and screening, and can effectively take into account the high quality, high yield and stress resistance of hybrid rice varieties (combinations), and the method has high selection efficiency, and the quality of new breeding combinations is guaranteed, and a systematic breeding program can be realized , The accuracy and systematicness of breeding are strong.

Description

technical field [0001] The invention belongs to a high-efficiency breeding method, in particular to a comprehensive screening method for a new combination of excellent hybrid rice. Background technique [0002] Rice is one of the most important food crops in my country. The number of hybrid rice varieties approved by the national examination and approval in our country accounts for about 80% every year. The breeding of new varieties of high-quality palatable, stable and high-yielding, high-resistant and widely suitable rice varieties is of great significance to ensure my country's food security and develop the rice industry. The breeding of new varieties of three-line or two-line hybrid rice includes the cultivation of parental materials and the matching and screening of hybrid combinations. In the screening of new hybrid combinations, the traditional technology adopts the empirical screening method, and the breeder screens the target hybrid new varieties (combinations) emp...

AI Technical Summary

Problems solved by technology

[0004] Some disadvantages of traditional experience breeding: ① There is no systematic variety selection procedure for experience breeding, and it is highly dependent on the experience of breeders; ② Experience breeding is poorly systematic, with heavy workload and low screening efficiency; ③ It is difficult to combine traditional breeding High-yield, high-quality, resistance and growth period screening of varieties, most of the varieties screened are high-yield but not high-quality, high-yield but not stress-resistant; ④The traditional breeding screening methods are mostly empirical qualitative screening, lack of necessary data, and poor understanding of the combined parental system , is not conducive to the improvement of breeding efficiency

[0005] The conventional experience breeding method of hybrid new combination is poor in breeding and screening system, it is difficult to take into account the high quality, high yield and stress resistance of hybrid rice varieties (combination), and the selection efficiency of empirical breeding method is low, and the quality of the new combination is not guaranteed , there is no systematic breeding program, and there is no systematic understanding of the parents of the hybrid combination, and the accuracy and systematicness of breeding are not strong

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