Paddy rice dual-purpose genic male sterile line single-season with regeneration cold water string irrigating seed replication method

Abstract

The invention belongs to the technical field of science and engineering, in particular to a propagation method for rice dual-purpose genic male sterile line seeds with the pattern of high-temperature sterile, low-temperature fertile or long day high-temperature sterile, short day low-temperature fertile. The technique of the method includes: (1) a propagation base is required not only to meet the need of normal growing development of the conventional rice, but also to have sufficient water source at temperature of 17-19 DEG C and plant no other rice variety in the periphery of 300m; (2) the seeding dates of the first rice crop are arranged on March,15th-20th, (3) the water temperature of the field is maintained between 20-21 DEG C for continuous 15 days from the fourth period of the differentiation of the first young ears, an irrigation depth is based on young ears submergence and the growth process of the young ears to irrigate from shallow to deep until the depth is up to 20m; (4) the stubble height of rice stub after first harvestry is 20-25cm, the water temperature of the field is maintained between 20.5-21.5 DEG C for continuous 16-20 days from the fourth period of the differentiation of the second young ears, the irrigation depth is up to 28cm from shallow to deep; (5) abnormal plants and inferior plants are strictly removed. By specifying the technique, the purpose of producing high-yield, high-quality and high efficiency rice dual-purpose genic male sterile line seeds can be achieved.

Description

Technical field: [0001] The invention belongs to the field of seed science and engineering technology, and specifically relates to a method for seed propagation of high-temperature sterile, low-temperature fertile or long-day high-temperature sterile and short-day low-temperature fertile rice dual-purpose male sterile lines. Background technique: [0002] The technical key of two-line hybrid rice lies in the cultivation of a dual-purpose GMS line that can produce seeds safely and reproduce successfully. At present, the starting point temperature of the sterile conversion of the light-temperature-sensitive dual-purpose GMS line selected in my country is generally 23-24°C. Such a CMS line may still be affected by short-term low temperature even when hybrid seed production is carried out in midsummer, causing the Fertility fluctuates, leading to a decrease in the purity of hybrid seed production, or even failure of seed production. Therefore, an effective method to improve the ...

AI Technical Summary

Problems solved by technology

However, the dual-purpose GMS line of rice has very strict requirements for cold water series irrigation, and a little carelessness will lead to failure of breeding