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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  • Abstract
  • Description
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  • Application Information

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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 of

Method used

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Examples

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Example Embodiment

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

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

[0056] (1) The two-line sterile line e-91S with multiple tillers and high stigma exposure rate obtained by mutagenesis was used as the female parent, and the two-line sterile line e-69S with short narrow leaf was used as the male parent to obtain F. 1 , And then use the two-line sterile line e-91S with multiple tillers and high stigma exposure rate as the recurrent parent to backcross 3 generations and then self-bred to obtain BC 3 F 2 generation.

[0057] (2) Planting BC in Hefei in early May 3 F 2 For seeds, microscopic examination of individual plants with multiple tillers, high stigma exposure, short narrow leaves and good agronomic traits at heading stage, and transplanting individual plants without pollen under microscopic examination, harvest individual seeds at maturity stage.

[0058]...

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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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