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Sexual hybridization method for rice

A sexual and rice technology, applied in the field of rice hybrid breeding, can solve the problems of unreasonable allocation of emasculation time and pollination time, incomplete emasculation, and low germination rate, so as to improve the efficiency of emasculation and avoid poor germination rate. High, improve the effect of hybridization efficiency

Inactive Publication Date: 2018-02-23
郴州市农业科学研究所
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Problems solved by technology

[0003] The technical problem to be solved by the present invention is to provide a method for sexual hybridization of rice, which can effectively solve the problem of low efficiency of sexual hybridization of rice in the prior art, incomplete emasculation, low germination rate, emasculation time and Pollination time cannot be allocated reasonably, etc.

Method used

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  • Sexual hybridization method for rice
  • Sexual hybridization method for rice

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Embodiment

[0027] In this embodiment, sexual hybridization of rice is carried out between three research groups (rice functional rice group, rice super rice group and rice conventional rice group) between the three research groups of the Rice Research Office of Chenzhou Institute of Agricultural Sciences. The hybridization steps are as follows:

[0028] (1) Spray water to cut grass, specifically include the following two steps:

[0029] ①Earing selection: After all the target ears of the hybrid female parent are headed, and about 1 / 3 of them have bloomed;

[0030] ② glume cutting: a, cut off the glumes that cannot bloom in the past two days, spray water immediately to make the spikes moist; b, cut off 2 / 5 of the glumes in step a, so that the anthers are damaged but do not hurt the stigma; c, Spray water again to process the spikes, so that the damaged anthers in the step b can touch the water, and the pollen absorbs water, and then, gently flick or cut off the anthers stretching out from...

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Abstract

The invention belongs to the technical field of rice crossbreeding, and specifically discloses a sexual hybridization method for rice. The method specifically comprises the three following steps: (1)spraying water and trimming a glume: trimming the glume by about 1 / 3-1 / 2 to break a pollen chamber without injuring a stigma, spraying water before and after trimming the glume; (2) setting appropriate pollination time reference: trimming a rice ear in advance when the large-scale hybridization is conducted, soaking in water, spin-drying, processing in a pocket, taking the rice ear as a signal ear, starting to trim the ear and perform pollination when the rice ear blooms; (3) bagging with a kraft bag: pollinating the rice ear subjected to water spraying and glume trimming in the step (1) aftera male parent blooms; and bagging with the kraft bag after pollinating. The methods of spraying water, trimming the glume, setting the pollination time reference, bagging with the kraft bag and the like are organically combined to form a whole set of novel sexual hybridization method, the hybridization efficiency is effectively improved, and the seed quality is guaranteed.

Description

technical field [0001] The invention belongs to the technical field of rice hybrid breeding, and in particular relates to a method for sexual hybridization of rice. Background technique [0002] Sexual hybridization is an important link in the selection and breeding of new rice varieties and the main way of rice germplasm innovation. Sexual hybridization includes three steps: castration, pollination, and bagging. The most commonly used methods of emasculation are emasculation with warm soup and emasculation with clipped glumes. Detassellation with warm soup is to soak in warm water at 42-45°C for 3-8 minutes to inactivate the pollen. However, the water temperature control is cumbersome, the soaking time is long, and the efficiency is low. Satisfy the needs; cutting glumes and detasseling, the efficiency is high, but the detasseling is not complete, and the chaff is damaged, which seriously affects the development of the endosperm, resulting in a serious decline in the germi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01H1/02
CPCA01H1/02
Inventor 彭丁文欧阳禛谭永明朱智勇陈海球
Owner 郴州市农业科学研究所
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