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Breeding method for awnless high-seed setting rate polyploid rice

A polyploid, high-fruiting technology, applied in the fields of botanical equipment and methods, applications, plant genetic improvement, etc., can solve the problems of polyploid rice with awns and low seed-setting rate

Active Publication Date: 2014-09-10
HUBEI UNIV +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The purpose of the present invention is to propose a method for breeding polyploid rice with no awn and high fruiting, so as to solve the problems of polyploid rice with awn and low seed setting rate in current polyploid rice breeding

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  • Breeding method for awnless high-seed setting rate polyploid rice

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Embodiment Construction

[0019] The present invention will be further described below with the embodiment—the breeding of ALHS001 (no.

[0020] a. Using polyploid awnless rice lines or hybrids as parents

[0021] The hybrids of the awnless polyploid rice lines DTS138 (japonica rice with a seed setting rate of about 10%) and DTS070 (indica rice with short awns and a seed setting rate of 60%) were used as hybrid parents;

[0022] b. Apply PMeS high-fruiting rice line or hybrid as another parent

[0023] Use the hybrid of our selected PMeS high-fruiting rice line Sg99012-4x and another line Dure as another parent;

[0024] c. Hybrids of rice lines without awns or hybrids and PMeS high-fruiting rice lines or hybrids of PMeS high-fruiting rice lines are carried out by compound crossing F1 of DTS138 / DTS070 and F1 of Dure / sg99012;

[0025] d. Select for no awn and high fruitiness on F1 or recross generation

[0026] According to the characteristics of no awn and high fruiting, the polyploid rice plants of...

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Abstract

The invention provides a breeding method for awnless high-seed setting rate polyploid rice. An awnless high-seed setting rate polyploid rice line is bred by subjecting an awnless polyploid rice line and a high-seed setting rate polyploid rice line with polyploidy meiosis stability (PMeS) to hybridization and composite cross. The method comprises the following steps: a) using the awnless polyploid rice line or hybrid as a parent; b) using the PMeS high-seed setting rate polyploid rice line as another parent; c) subjecting the awnless polyploid rice line and the PMeS high-seed setting rate polyploid rice line or a hybrid thereof to hybridization; d) carrying out awnless and high-seed setting rate selection on F1 or composite cross generation 1; e) continuously carrying out awnless and high-seed setting rate selection on strains of F2-F8 or composite cross generation 2-8; and f) breeding an awnless high-seed setting rate polyploid rice strain into the stable awnless high-seed setting rate polyploid rice line. The awnless high-seed setting rate polyploid rice line provided by the invention overcomes the problem that polyploid rice normally has awn and a low seed setting rate; application of the awnless high-seed setting rate polyploid rice in rice production is beneficial for alleviation of world food crisis.

Description

technical field [0001] The invention relates to a method for breeding polyploid rice with no awn and high fruitiness, which is a method for breeding a high-fruit polyploid rice line without awn by combining the awnless characteristic of polyploid rice and the high fruitiness characteristic of PMeS strain The invention belongs to the technical field of crop breeding of modern agriculture. Background technique [0002] Breeding super rice using the dual advantages of distant hybridization and polyploidy is a new rice breeding strategy proposed by Cai Detian, Yuan Longping, and Lu Xinggui (Cai Detian et al., Acta Crops Sinica, 2001), but there have been several problems in polyploid rice breeding for a long time. One is that polyploid rice generally has awns, and the existence of awns is not conducive to production operations and feed applications; the other is that polyploid rice generally has a seed setting rate of less than 50% and cannot be used in production. The awnless ...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01H1/02A01H1/04
Inventor 蔡得田宋兆建王维张献华何玉池刘育华丁鸣
Owner HUBEI UNIV
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