Double layer rice selective breeding method

Abstract

The invention provides a method for selecting bi-layer rice, comprising following steps: (1) preparing basic-layer rice seed with normal seed preparing method by selecting short-stem rice variety or strain; (2) preparing high-layer rice seed with normal seed preparing method by selecting high-stem rice variety or strain; the difference in crown height during ear-homogenous period between the high-layer and basic-layer is 5-100 cm; (3) matching according to proportion of 50-98: 2-50 between basic-layer and high-layer, mixing evenly and getting bi-layer rice seed. The got rice variety can make full use of light and temperature more effectively and thus increase the rice yield potential by 5-30%.

Description

technical field [0001] The invention relates to a matching method of double-layered rice, belonging to the technical field of breeding methods for new plant varieties. Background technique [0002] As one of the most important food crops in the world, especially in Asia, rice has made great progress in the genetic improvement of yield traits in the past 30 years. The dwarf breeding of rice varieties in my country that began in the mid-1950s and the large-scale application of hybrid rice in the 1970s brought about two leaps in rice production in my country. The combination of inter-subspecies heterosis utilization and morphological improvement has brought great success to today's super hybrid rice breeding. However, a grim reality that cannot be ignored is that the arable land area of ​​the world is still decreasing at this stage, while the population is increasing year by year. The per capita arable land area in my country has also dropped from 2.7 mu in 1950 in the early ...

AI Technical Summary

Problems solved by technology

In this context, to continue to greatly increase the utilization rate of group light energy can only develop towards three-dimensional space