Light-sensation two-line cultivation method

Abstract

The invention relates to a new technical field of rice breeding and particularly relates to a light-sensation two-line cultivation method. The cultivation method concretely comprises the steps of: hybridizing wild rice with commonly cultivated rice, selecting a good strain line, cultivating seeds of the good strain line to germinate, mutagenizing the strain line by focusing sunlight radiation, breeding the multagenized strain line in a iteration generation way, finding a semi-sterile strain in the third generation, cutting stump and tillering for dividing the strain into two strains, respectively transplanting the two strains to places with different elevations, and breeding out light-sensation two lines by the obtained material seeds, wherein the strain in a place in which the daytime is longer than 13 hours is taken as males with fertility and the strain in a place in which the daytime is shorter than 13 hours is mail without the fertility. The light-sensation two-line is bred out by implementing the method, i.e., a new product can be found from variation and stability can be achieved rapidly.

Description

technical field [0001] The invention relates to a new technology field of rice breeding, in particular to a method for cultivating two lines of light sensitivity. Background technique [0002] With the reduction of cultivated land and the increase of population in our country, the issue of food security has always been a top priority. Planting two-line hybrid rice is the most effective way to increase the yield per unit area of ​​grain crops. At present, the planting area of ​​two-line hybrid rice in my country is increasing year by year, and the planting area of ​​two-line hybrid rice in Anhui, Hubei, Hunan and other provinces has exceeded that of three-line hybrid rice. With the continuous deepening of the research on the utilization of rice heterosis by the two-line method and the continuous improvement of the two-line method seed production technology, the two-line method hybrid rice will make a more significant contribution to my country's food security. However, in t...

AI Technical Summary

Problems solved by technology

Cold water series irrigation has a large investment cost in base construction; serious waste of water resources, which conflicts with large-scale production water; limited water resources suitable for cold irrigation, low guarantee rate; low seed breeding yield, and poor benefits

The main problems of winter propagation in Hainan are poor safety, unstable yield and poor quality of CMS seeds produced

[0004] However, the above-mentioned scheme is not only technically professional and complicated, but also requires professional facilities and equipment for its implementation, because the scheme is based on the temperature requirements for the fertility of the dual-purpose GMS line in the fertility-sensitive period and the safety of the earing poplar flowering period. Processing technology, establish a data model of rice dual-purpose GMS line breeding, and develop a set of practical and operable breeding base selection system for rice dual-purpose GMS line