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Method for increasing total grain number of single spike of two-line hybrid early indica rice

An early indica rice, the technology of total grain number, applied in the direction of botany equipment and method, plant gene improvement, application, etc., can solve the problem that the method of increasing the total grain number of two-line hybrid early indica rice has not yet been improved, and achieve the purpose of improving seed reproduction and seed production efficiency, high yield, and the effect of increasing yield per unit area

Active Publication Date: 2019-11-08
ZHEJIANG ACADEMY OF AGRICULTURE SCIENCES
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there is no report on the method of using clustered early indica rice resources as the breeding parent of the two-line hybridization method to increase the total grain number per panicle of the two-line hybrid early indica rice and its varieties

Method used

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  • Method for increasing total grain number of single spike of two-line hybrid early indica rice
  • Method for increasing total grain number of single spike of two-line hybrid early indica rice

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Experimental program
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Effect test

Embodiment 1

[0020] (1) The early indica rice "Zhe 17104" (a strain selected by Zhejiang Academy of Agricultural Sciences, purchased from Zhejiang Academy of Agricultural Sciences) with 2 clusters on top spikelets was selected as the male parent. Zhejiang 17104 characteristics: the whole growth period is about 110 days, the plant height is about 89.3cm, the effective panicles per mu are about 216,000, the panicle length is about 16.5cm, and 2 grains of rice grow side by side on the top of each small branch; the total number of grains per panicle is about 133.4 grains, about 109.5 grains per panicle, about 82.1% seed setting rate, about 25.8g thousand-grain weight, oval grain shape, suitable for processing and other purposes.

[0021] (2) Xiangling 628S was selected as the female parent of the two-line CMS hybrid.

[0022] (3) Hybridization and preparation of two-line hybrid early indica rice combination "Lingliangyou 17014" (Xiangling 628S×Zhe 17104). The two-line hybrid early indica rice...

Embodiment 2

[0026] (1) In 2014, "Xiangling 750S" was used as the female parent, and the early indica rice "Zhe 17104" (a strain selected by the Zhejiang Academy of Agricultural Sciences and purchased from Zhejiang Academy of Agricultural Sciences) was used as the male parent for hybridization, with the selection criteria for the two-line CMS and the traits of clustering 2-4 grains on top spikelets as the breeding targets, and the cluster-type two-line CMS was selected generation by generation. The two-line male sterile line material "4528S" with two clustered spikelets was produced.

[0027] (2) "4528S" was selected as the female parent, and "05YP16" (the conventional early indica rice material selected by Zhejiang Academy of Agricultural Sciences, which is the male parent of the two-line early indica hybrid rice "Lingliangyou 0516") was selected as the male parent.

[0028] (3) Two-line hybrid early indica rice combination "4528S×05YP16" was prepared by hybridization, and the two-line hy...

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Abstract

The invention relates to the technical field of rice breeding, in particular to a method for increasing the total grain number of a single spike of two-line hybrid early indica rice. An existing dual-purpose sterile line carrying photo-thermo sensitive genic male sterile genes serves as a female parent, apical spikelet 2-4-grain clustered early indica rice with a growth period not 2 days longer than that of the female parent serves as a male parent for hybridization, carrying of the photo-thermo sensitive genic male sterile genes and apical spikelet 2-4-grain clustering characters serve as breeding goals, clustered dual-purpose sterile line breeding is successively performed, and then conventional early indica rice in normal single-grain insertion is selected as a male parent to prepare atwo-line hybrid early indica rice combination. According to the two-line hybrid early indica rice combination obtained by the technology, the planted rice has the advantages that parts of apical spikelet 2-grains are clustered, the total grain number of the single spike is obviously increased, thousand seed weight and maturing rate are kept at normal level, high yield is achieved and the like, andper unit yield can be effectively improved.

Description

technical field [0001] The invention relates to the technical field of rice breeding, in particular to a method for increasing the total number of grains per panicle of two-line hybrid early indica rice. Background technique [0002] Hybrid rice breeding is a breeding technique to increase rice yield by utilizing the heterosis of rice. At present, there are mainly two methods: three-line hybridization method and two-line hybridization method. Compared with the two-line hybridization method, the breeding procedures and production links of the three-line hybrid method are relatively complicated, the cycle of breeding new combinations is long, the efficiency is low, and the seed production links are many, slow, high cost, and expensive; compared with the three-line hybrid method In contrast, the biggest advantage of the two-line hybridization method is that it does not require a maintainer line, the seed production procedure is simple, the combination is free, the utilization r...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01H1/02
CPCA01H1/02
Inventor 俞法明张小明朱国富叶胜海翟荣荣叶靖
Owner ZHEJIANG ACADEMY OF AGRICULTURE SCIENCES
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