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Hybrid rice breeding method

A technology of hybrid rice and rice, which is applied in the field of agricultural biology, can solve the problems of increasing the cost of seed production and easily damaging the ears, and achieve the effects of increasing seed production yield, increasing the amount of pollen of the male parent, and saving production costs

Active Publication Date: 2018-12-14
RICE RES ISTITUTE ANHUI ACAD OF AGRI SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, leaf cutting not only requires a lot of labor support and related labor costs, but also easily damages the ear, and the rice ear is often taken out by the cutter.
Spraying "920" also requires a lot of labor and related expenses, both methods increase the cost of seed production

Method used

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Experimental program
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Effect test

Embodiment 1

[0054] Breeding of hybrid rice with high seed production yield of embodiment 1

[0055] 1. Breeding of two-line CMS lines with multiple tillers, high stigma exposed rate, and short and narrow leaves

[0056] (1) F 1 , and then use the two-line CMS line e-91S with multiple tillers and high stigma exposed rate as the recurrent parent to backcross for 3 generations and self-cross to obtain BC 3 f 2 generation.

[0057] (2) Plant BC in Hefei in early May 3 f 2 For seeds, at the heading stage, perform microscopic examination on individual plants with multiple tillers, high stigma exposure rate, short and narrow leaves, and good agronomic properties, and perform stubble transplantation on individual plants that have no pollen in the microscopic examination, and harvest individual seeds at the mature stage.

[0058] (3) In Sanya in the first ten days of November of the same year, plant the individual plant seeds harvested in step (2), and harvest the seeds at maturity.

[0059]...

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Abstract

The invention discloses a hybrid rice breeding method. The hybrid rice breeding method comprises: separately selecting two sterile lines with high tillering, a high stigma exsertion rate and short andnarrow leaves and a restoring line with high tillering, large ears and short and narrow leaves, carrying out test mating through the sterile lines as female parents and the restoring line as a male parent, planting the F1 generation and selecting a hybridized composition with excellent agronomic traits. The method breeds hybrid rice parents with high tillering, a high stigma exsertion rate, largeears and short and narrow-leaves. In production of hybrid seeds, leaves are not cut, 920 is not sprayed, the amount of male parent pollen is increased, the pollination obstacles are reduced, the maturing rate is improved, the seed yield is greatly improved, the dependence on labor in the hybrid rice seed production process is reduced, the seed production efficiency is improved and the seed production cost is reduced.

Description

technical field [0001] The invention relates to the field of agricultural biotechnology, in particular to a hybrid rice breeding method. Background technique [0002] Since Yuan Longping discovered male sterile rice in Dongting Early Indica Nante in 1964, hybrid rice research in China has experienced a glorious course of half a century. Rice is the most important food crop. More than half of the world's population takes rice as a staple food, and it is even higher than 60% in my country. Hybrid rice has been promoted in my country for more than 8 billion mu, with a cumulative increase of more than 600 billion kilograms of rice. important contribution to world food security. [0003] Seed production is an important part of hybrid rice production, which determines the scale and quality of hybrid rice combination promotion. Before seed production and pollination, in order to better allow the pollen of the male parent to fall on the stigma of the female parent, solve the obstac...

Claims

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Application Information

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IPC IPC(8): A01H1/02A01H1/04
CPCA01H1/02A01H1/04
Inventor 从夕汉罗志祥施伏芝阮新民罗玉祥吕孝财占新春
Owner RICE RES ISTITUTE ANHUI ACAD OF AGRI SCI
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