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Seed selection method of paddy in population and variety

A technology of population and rice, applied in the fields of botanical equipment and methods, applications, and plant genetic improvement, which can solve the problems of inability to meet the requirements of variety consistency, infringement, and lack of multi-genotype varieties.

Inactive Publication Date: 2006-04-19
RICE RES INST GUANGDONG ACADEMY OF AGRI SCI +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Otherwise, if you want to make a highly specialized variety, simple mixing will not be able to meet the consistency requirements of the variety
And mixed breeds have "infringement problems" for each breed
Therefore, there is no multi-genotype variety in the general sense on rice so far, and no multi-genotype variety for large-scale production has really been formed in wheat.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] Embodiment 1 hybridization design

[0043] 1. Experimental materials:

[0044] Eight parent materials from different sources were used in this experiment: Lixianzhan, Shantaizhan 8, Weiyou 35, IIyou 46, Dyou 64, Weiyou 64, Shanyou 63, Shanyou 64.

[0045] 2. Experimental method:

[0046] 1. There are 2 original parents in the female parent group: Lixianzhan and Shantaizhan 8

[0047] Hybridization method:

[0048] Lixianzhan × Shantaizhan 8, resulting in F 1 Generation self-propagation for one generation, and the 10 individual plants of the separated generation produced are used as the female parent group;

[0049] Weiyou 35×IIyou 46, Dyou 64×Weiyou 64, Shanyou 63×Shanyou 64, 1000 individual plants produced by crossing were used as male parent group, and crossed with female parent group respectively;

[0050] 2. There are 3 original parents in the female parent group: Lixianzhan, Shantaizhan 8, Weiyou 35

[0051] Hybridization method:

[0052] (Lixianzhan×Shantaizh...

Embodiment 2

[0053] Embodiment 2 paddy rice population, method for breed selection

[0054] 1. Experimental materials:

[0055] In this experiment, 12 parental materials from different sources were used. Zhongeranzhan, Yuehuazhan, Yuetaizhan and Erbazhan are high-quality varieties bred by the Rice Institute of Guangdong Academy of Agricultural Sciences; Fengaizhan and Yuexiangzhan are from Guangdong Province. High-yield rice varieties bred by the Academy of Agricultural Sciences; Qiguizao and Texianzhan 13 are high-yield varieties bred by Guangdong Foshan Agricultural Science Institute; Duokang 578, Duokang 580, and Duokang 583 are disease-resistant varieties introduced by the International Rice Research Institute of the Philippines strain. Lemont is a famous American premium variety. The control is Yuexiangzhan, which is the control species of the current national rice regional experiment and Guangdong rice variety regional experiment.

[0056] 2. Experimental method:

[0057] Scheme ...

experiment example 1

[0083] In 2003, all the same stable lines were planted in different ecological zones of Changjiang University in Hubei Province, and the heading stage, plant height at heading stage, maturity stage, plant height at maturity stage and yield per plant were observed. Screening was also carried out on the computer. This time, the yield per plant was first sorted, and the single plant with a yield of less than 20 grams was eliminated to obtain another 25 populations, HBJT1-HBJT25. The consistency of the population selected by the computer can basically be achieved. Both specificity and consistency are determined by the range of setting and the accuracy of determination, which can be controlled by humans, and only need to make appropriate selections for the selected populations and eliminate obvious hybrids. Because it is self-pollinated crops in the reproduction stability will not change.

[0084] 1. Performance of Guangzhou group rice strains: Through the steps of selecting the he...

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Abstract

The invention relates to agricultural breeding field, more specifically to a rice population, variety selection method. Rice population is obtained by female parent hybridization with male parent, in which female parent group is obtained through rice parent hybridization of different aim character, male parents is chooen from homozygous strain or variety, or segregating generation of heterozygote, individual plant with segregation character is produced, or after each individual plant selfing. The population variety has characters of coherence, stability, specificity, high adaptability, disease resistance and high yield.

Description

【Technical field】 [0001] The invention relates to the field of crop selection and breeding, in particular to a method for rice population and variety selection and breeding. 【Background technique】 [0002] Rice is the staple food of one-third of the world's population, and food production has always been an important foundation of the world economy. At present, the rice varieties used at home and abroad are divided into two categories: conventional rice and hybrid rice, all of which are single genotypes in terms of genotype. Conventional rice is a stable and improved single-genotype variety obtained through multi-generation single-plant selection after crossing appropriate parents. G.S. Khush of the International Rice Research Institute bred IR8 in 1965, and Huang Yaoxiang, etc. Square dwarf, they have made important contributions to rice dwarf breeding (Huang Yaoxiang, International rice Congress, 2002.9), and have a major impact in the world; the hybrid rice created by Ac...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A01H1/02A01H1/00A01H1/04
CPCA01H1/04A01H1/00A01H1/02
Inventor 李晓方肖昕毛兴学陈建伟罗文永刘彦卓
Owner RICE RES INST GUANGDONG ACADEMY OF AGRI SCI
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