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Breeding method for paddy indica japonica-compatible restoring line

A restorer line and indica-type technology, applied in the field of crop genetics and breeding, can solve the problems of indica-japonica hybrid reproduction obstacles, difficult to stabilize offspring, etc., and achieve the effects of overcoming reproductive obstacles, rapid grain filling, and high combining ability.

Active Publication Date: 2013-12-18
ZHENJIANG AGRI SCI INST JIANGSU HILLY AREAS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the large differences between the indica and japonica genomes, there is a reproductive disorder in the indica-japonica hybrid, and the offspring are difficult to stabilize

Method used

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  • Breeding method for paddy indica japonica-compatible restoring line

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Breeding of rice indica-type parent-japonica restorer lines is as follows:

[0031] 1. Construction of Parents

[0032] From 2002 to 2005, the high combining ability restorer line Zhenhui 084 (084) was crossed with the japonica restorer line 351, and the intermediate material 9902 was obtained through four consecutive generations of selection, namely (084 / 351) F 4 ; At the same time, 084 was crossed with 9311, a commonly used restorer line of two-line hybrid rice, and the intermediate material 9987 was obtained after 6 consecutive generations of selection, namely (084 / 9311) F 6 .

[0033] 2. Hybrid breeding:

[0034] In 2005, in Hainan, indica-japonica hybrid intermediate material (084 / 351) F 4 As the female parent, with excellent intermediate materials (084 / 9311) F 6 As the male parent, Zhenhui 82, an indica parent-japonica restorer line, was bred by hybridization.

[0035] f 2 Generations began to select individual plants; free [(084 / 351) F 4 / / (084 / 9311)F 6 】...

Embodiment 2

[0048] Hybrid rice breeding, specifically as follows:

[0049] The high-quality three-line male sterile line Zhenxian 1A was used as the female parent, and Zhenhui 82 was used as the male parent to prepare the combination Zhenxian 1A / Zhenhui 82 (Zhenxianyou 82). The average yield per mu reached 680.5 in the comparison test for two consecutive years. Kilogram.

[0050] The photo-temperature-sensitive two-line male sterile line 1892S was used as the female parent, and Zhenhui 82 was used as the male parent to prepare a hybrid combination 1892S / Zhenhui 82 (9 You 82). It participated in the company's product comparison test for two consecutive years, and the yield per mu reached 705.1 Kilogram.

[0051] It can be seen that Zhenhui 82 generally has high combining ability and broad-spectrum restoring ability. Through the identification of hybrid rice combinations with different types of two-line sterile lines and three-line sterile lines, it is found that this restorer line can be ...

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Abstract

The invention provides a breeding method for a paddy indica japonica-compatible restoring line. The breeding method comprises the following steps: constructing a female parent, namely hybridizing a restoring line with high combining ability with a japonica restoring line (carrying wide compatibility) to obtain the female parent; constructing a male parent, namely hybridizing a restoring line with high combining ability with a common restoring line for two-line hybrid rice to obtain the male parent; and hybridizing for breeding, namely hybridizing the female parent and the male parent for culturing the paddy indica japonica-compatible restoring line. The breeding method utilizes an indica-japonica hybridized middle material as a bridge and adopts an indica-japonica-indica multiple-crossed manner to overcome the reproductive disorder between indica and japonica; offspring materials are stable and the aim of rapidly fixing the advantages of the indica and the japonica is realized; the paddy indica japonica-compatible restoring line Zhenhui 82 obtained by the method is rapid to grout, has full seeds, has high yield and multiple resistances, has a broad spectrum restoring capability and has high common combining ability.

Description

technical field [0001] The invention belongs to the field of crop genetics and breeding, and in particular relates to a breeding method for rice indica-type japonica restorer lines. Background technique [0002] Hybrid rice has the advantages of high yield, wide adaptability, and easy cultivation. The planting area accounts for 55% of the total rice area in the country, and the output accounts for more than 60% of the total rice output. It has made a great contribution to my country's grain production. Although my country's hybrid rice breeding has made great progress, it is also facing the situation that the planting area and per unit yield level have been stagnant for many years. With the increase of people and the decrease of land, the food problem is still a social problem that cannot be ignored. The new combination of hybrid rice that has a breakthrough in yield and yield has become an urgent problem to be solved in hybrid rice breeding in my country. [0003] Breeding ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01H1/02A01H1/04
Inventor 曾生元龚红兵林添资盛生兰景德道余波钱华飞周义文李闯刁立平
Owner ZHENJIANG AGRI SCI INST JIANGSU HILLY AREAS
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