Early-maturing late japonica rice crossbreeding method

Abstract

The invention relates to the field of agricultural breeding, and particularly discloses an early-maturing late japonica rice crossbreeding method. The crossbreeding method comprises the following steps of S1, screening japonica conventional glutinous rice 1 and japonica conventional rice 2 as parents for cross breeding, then screening japonica conventional glutinous rice 3 as a second-generation parent F22, and carrying out cross breeding to obtain a hybrid F1122; S2, planting the hybrid F1122, conducting investigating and screening, and selecting plants F88 from stable strain plants; and S3,planting the bred plants F88, and selecting plants with agronomic traits similar to those of recurrent parents, thorough pollen abortion and fertility transformation temperature similar to that of therecurrent parents from the stable strain plants for breeding seeds to breed the early-maturing late japonica rice. According to the early-maturing late japonica rice crossbreeding method, the three-line crossbreeding time is shortened, and the breeding efficiency in the crossbreeding process is improved.

Description

technical field [0001] The application relates to the field of agricultural breeding, more specifically, it relates to a method for hybrid breeding of early maturing late japonica rice. Background technique [0002] High yield, high quality, disease resistance, and high efficiency are the eternal pursuit goals of the rice breeding community. So far, hybrid rice breeding has experienced three-line method and two-line method, and has experienced inter-species hybridization and inter-subspecies hybridization in utilization methods. Today, with the rapid development of biotechnology, especially genetic engineering, many breeding theories and methods have been perfected and updated, but hybrid breeding and heterosis utilization are still one of the important breeding methods for cultivating fine varieties for a long time. Use simple comparison test or multi-year multi-point randomized block test to evaluate the advantages and disadvantages of new hybrid rice combinations. The for...

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Problems solved by technology

[0004] In view of the above-mentioned scheme of improving the efficiency of the multi-year multi-point random block test method breeding scheme through the machine-transplanting scheme, the applicant believes that the scheme of breeding through the machine-transplanting scheme has a large amount of soil and serious damage to the soil cultivation layer. When the subsequent continuous breeding is caused, the quality of the seedlings planted in the follow-up will be poor, resulting in a prolonged breeding cycle, which will eventually reduce the efficiency of hybrid rice breeding after breeding

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