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Method for breeding recovery line of trilinear super hybridized rice

A technology of restorer lines and hybrid rice, applied in the field of plant genetics, can solve the problems of hovering yield potential at the same level, lack of restorer genes, and poor shape of plants and leaves, so as to promote healthy and steady development, improve production level, and high effect

Inactive Publication Date: 2003-06-04
WUHAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Conventional super rice cannot be directly used as a restorer line in hybrid rice, because it lacks restorer genes, and has the disadvantages of poor plant and leaf morphology and weak tillering
At the same time, the yield-increasing potential of general hybrid rice restorer lines is only hovering at the same level.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0034] The super rice bred by International Rice and BP98 in Java were selected and crossed with three domestic excellent restorer lines. 2 More than 2,000 individual plants were selected from the large population, and 9 stable super rice restorer lines were established through systematic breeding and test-crossing and recrossing, which have been self-homogenous to the ninth generation. , Using the Wujin 4A (zebra leaf sterile line) bred by Wuhan University and the super rice, several new super high-yielding, high-quality, lodging and disease-resistant combinations such as Wujin 298 and Wujin p88 have been bred. The combination product is compared to the experimental stage.

[0035] Preliminary tests show that the super hybrid rice combination has a compact plant type, straight leaves, strong tillering ability, large panicles and many grains, an average number of spikelets per panicle of about 400, a seed setting rate of more than 85%, a dry grain weight of 26 grams, and a gra...

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Abstract

A method for breeding the recovery line of trilinear super-hybridized rice features that the genetic difference between conventional super rice, Java rice BP98 and more excellent Chinese recovery lines is used for aggregate hybridization to obtain a new recovery line, which features high stability, big ear, more grains, wide recovery range, and high affinity, quality and resistance.

Description

Technical field [0001] The invention relates to a kind of conventional super rice variety of the International Rice Research Institute and Java rice BP98 with different restoration sources and the genetic differences of multiple domestic excellent restorer lines, and after polymerization hybridization, a stable, large panicle, multi-grain and restoration surface is bred. A new restorer line with broad, strong affinity, good quality and good resistance. The hybrids in the mating group showed strong tillering ability, resistance to lodging, the average number of grains per panicle was 350-450, and the seed setting rate was over 85%. The breeding method belongs to the technical field of plant genetics. Background technique [0002] Hybrid rice has been popularized and applied in my country for more than 20 years. In recent years, in order to bring hybrid rice to a higher level, all rice-producing provinces are selecting new combinations of "three-line hybrid rice", "two-line h...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A01H1/02
Inventor 余金洪丁毅彭晓玲
Owner WUHAN UNIV
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