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A kind of rice sexual hybridization method

A hybridization method, sexual technology, applied in botany equipment and methods, plant genetic improvement, application, etc., can solve problems such as incomplete castration, inconvenient operation, long castration time, etc.

Active Publication Date: 2020-10-27
永州市农业科学研究所
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The most commonly used methods for detasseling are warm soup detasselling and clipping detasseling. The water temperature control of warm soup detasseling is cumbersome, the detasseling time is long, and the efficiency is low, which cannot meet the needs; Spray water (vinegar) to cut glumes with a lot of water (vinegar), which is inconvenient to operate
[0003] And the existing pollination method is to pollinate when the male parent panicle blooms, so the time is very tight, and the pollen waste is very serious when picking the panicle, resulting in insufficient pollination

Method used

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  • A kind of rice sexual hybridization method

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] In Yongzhou Agricultural Science Research Institute of Hunan Province, rice variety 9311 was selected as the female parent and rice variety MR219 was used as the male parent for hybridization.

[0048] S2011, select the female parent panicle 1 day after flowering, cut off the flowered and immature spikelets, and keep the first spikelet;

[0049] S2012, cutting off the outer glume of the first floret, retaining 1 / 4 of the base of the first floret; and cutting off 1 / 3 of the top of the first floret to obtain the glume after clipping;

[0050] S2013, clipping the filaments in the glumes clipped, picking out the anthers in the glumes clipped, and completing the emasculation of the female panicle;

[0051] S2014, bagging the emasculated female ear with a parchment paper bag, and folding the top of the emasculated female ear to complete the bagging process of the female parent ear;

[0052] S2021. Clipping 1 / 3 of the unflowered spikelets in the male parent panicle; wherein t...

Embodiment 2

[0056] In Yongzhou Agricultural Science Research Institute of Hunan Province, rice variety 9311 was selected as the female parent and rice variety MR220 was used as the male parent for hybridization.

[0057] S3011, select the female parent panicle 2 days after flowering, cut off the flowered and immature spikelets, and keep the first spikelet;

[0058] S3012, cutting off the outer glume of the first floret, keeping 1 / 4 of the base of the first floret; and cutting off 1 / 3 of the top of the first floret, to obtain the glume after clipping;

[0059] S3013. Cut off the filaments in the glumes clipped, pick out the anthers in the glumes clipped, and complete the emasculation of the female panicle;

[0060] S3014, bagging the emasculated female ear with a parchment paper bag, and folding the top of the emasculated female ear to complete the bagging process of the female parent ear;

[0061] S3021. Clipping 1 / 2 of the unflowered glumes in the male parent panicle; wherein the non-bloo...

Embodiment 3

[0065] In Yongzhou Agricultural Science Research Institute of Hunan Province, rice variety 9311 was selected as the female parent and rice variety MR84 was used as the male parent for hybridization.

[0066] S4011, select the female parent panicle 1 day after flowering, cut off the flowered and immature spikelets, and keep the first spikelet;

[0067] S4012, cutting off the outer glume of the first floret, keeping 1 / 4 of the base of the first floret; and cutting off 1 / 3 of the top of the first floret to obtain the glume after clipping;

[0068] S4013. Cut off the filaments in the glumes clipped, pick out the anthers in the glumes clipped, and complete the emasculation of the female panicle;

[0069] S4014, bagging the emasculated female ear with a parchment paper bag, and folding the top of the emasculated female ear to complete the bagging process of the female parent ear;

[0070] S4021. Clipping 1 / 2 of the unflowered glumes in the male parent panicle; wherein the non-bloom...

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Abstract

The invention belongs to the technical field of crop cultivation, and specifically relates to a sexual hybridization method of rice. The method includes the following steps that female parent spikes are subjected to glume cutting, castration and bagging, wherein the glume cutting process is used for retaining 1 / 4 outer glume of first glumous flowers in the female parent spikes, and the first glumous flowers are the glumous flowers whose anthers stretch a certain distance greater than half length of the outer glume; male parent spikes are subjected to glume cutting for use, and the female parent spikes subjected to glume cutting, castration and bagging are pollinated with pollen of the male parent spikes. The castration of the female parent spikes is thorough, the pollination efficiency isimproved, and the amount and quality of the seeds are ensured.

Description

technical field [0001] The invention belongs to the technical field of crop planting, 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 for detasseling are warm soup detasselling and clipping detasseling. The water temperature control of warm soup detasseling is cumbersome, the detasseling time is long, and the efficiency is low, which cannot meet the needs; Spraying water (vinegar) to cut glumes has a lot of moisture (vinegar), which is inconvenient to operate. [0003] And the existing pollination method is to pollinate when the male parent panicle blooms, which is very tight in time, and the pollen waste is very serious when picking the panicle, resulting in insufficient...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A01H1/02
Inventor 胡继银谢宜芝欧阳国春孙小成徐敏黄尚武朱旺冲杨烨唐利忠潘九林唐彬
Owner 永州市农业科学研究所