Method for producing ternary hybrid japonica rice with stable and high yield, high purity and high germination rate

Abstract

The invention relates to a method for producing ternary hybrid japonica rice with stable and high yield, high purity and high germination rate, which mainly comprises the following steps of: (1) selecting a proper seed production base; (2) selecting a high-purity sterile line to be used as a female parent for seed production; (3) selecting a proper sowing period and seedling transplanting period; (4) reasonably accelerating germination, and cultivating and strengthening seedlings: uniformly and thoroughly airing seeds before sowing, soaking the aired seeds in an agent, and sowing the seeds when the germination rate reaches about 60%; (5) choosing proper density and line ratio to ensure sufficient number of productive ear for the female parent; (7) applying effective flowering phase and flowering time adjustment technologies mainly including a fertilizer adjustment method and a gibberellic acid adjustment method; (8) enlarging the ear height difference between the male parent and the female parent by using gibberellic acid; (9) carrying out artificial supplementary pollination; and (10) effectively controlling pests and weeds, harvesting the rice at the right time, and carrying out fine processing to ensure that seeds with high purity and high germination rate are obtained.

Description

technical field [0001] The invention belongs to the technical field of seed production, in particular to the technical field of three-line hybrid japonica rice seed production. Background technique [0002] At present, my country has about 450 million mu of rice area, including about 130 million mu of japonica rice. Conventional japonica rice and hybrid japonica rice are the two main types of japonica rice production at present, of which conventional japonica rice accounts for about 96% of the total area of ​​japonica rice, while hybrid japonica rice only accounts for 4% of the total area of ​​japonica rice. The higher seed price of hybrid japonica rice compared with conventional japonica rice is one of the main factors limiting the demonstration and promotion of hybrid japonica rice. The reason for the high seed price of hybrid japonica rice is mainly due to the imperfect seed production technology of hybrid japonica rice, which is manifested in the low seed production and...

AI Technical Summary

Problems solved by technology

[0008] Chinese patent CN200910228819.2 discloses "Japonic Hybrid Rice Seed Production Method", which is mainly for the research of Japonica CMS line 17A and restorer line R1415. The parental sowing date, row ratio and other technologies mentioned in this method are not available. Universality, its implementation effect needs to be further verified