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Breeding method and application of new recessive dwarf rape

A technology of brassica napus and dwarf stalks, which is applied in the fields of application, botany equipment and methods, plant gene improvement, etc., can solve the problems of lodging reduction, plant height, etc., and achieve the effect of increasing unit yield and solving plant height

Active Publication Date: 2016-04-13
贵州省油菜研究所
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to provide a new type of recessive dwarf rapeseed breeding method and its application, which can breed semi-dwarf rapeseed varieties with lodging resistance, so as to solve the problems caused by the high plant height in the current rapeseed production. The problem of lodging and production reduction

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  • Breeding method and application of new recessive dwarf rape
  • Breeding method and application of new recessive dwarf rape
  • Breeding method and application of new recessive dwarf rape

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Embodiment 1

[0017] Embodiment 1 of the present invention: Breeding of a new recessive dwarf rapeseed:

[0018] 1) Hybridization test: The Brassica napus variety Jingyou No. 2 was used as the female parent and the Brassica napus variety Deyou No. 5 was used as the male parent to obtain F 1 , bagging self-breeding to obtain segregated populations;

[0019] 2) Acquisition of a new recessive dwarf rapeseed: on 410 F 2 The traits of plant height, number of primary branches, length of main inflorescence, number of siliques in main inflorescence, length of siliques and number of seeds per horn were identified for a single plant, and traits such as mustard, glucosinolate, oil content and protein content were detected at the same time, and 1 Dwarf stalked rapeseed; identified at multiple points (Guiyang Jinyang, Guizhou Tangtou) and for many years (2005-2011), the plant type, plant height, branches and main inflorescence are very stable. These traits are specifically shown as: plant height ...

Embodiment 2

[0020] Embodiment 2 of the present invention: Genetic identification of a novel recessive dwarf trait:

[0021] 1) Dominance and recessiveness of dwarf stem traits: Reciprocal cross between dwarf material and tall Brassica napus variety Zhongshuang 11, F 1 The plants all showed a phenotype similar to that of Zhongshuang 11, indicating that the short stem is recessive to the tall stem, and there is no cytoplasmic effect; the F of plant height and related traits 2 The traits of the population were segregated, showing continuous distribution characteristics, typical quantitative inheritance characteristics, and multimodal distribution at the same time. It was inferred that the dwarf trait may have a major gene effect;

[0022] 2) Genetic analysis and identification of new dwarf traits: F 1 (P 1 ×P 2 ,P 2 ×P 1 ), F 1 (P 2 ×P 1 ) selfing seeds to get F 2 , and cross to obtain B 1 (F 1 ×P 1 ) and B2(F 1 ×P 2 ), to construct a 6-generation population (P 1 ,P 2 ,...

Embodiment 3

[0023] Embodiment 3 of the present invention: Application of a new type of recessive dwarf rapeseed in breeding semi-dwarf rapeseed:

[0024] F 1 , a segregated population was obtained by selfing, with a total of 521 F 2 For a single plant, a semi-dwarf material with a plant height of about 1.5m can be obtained through continuous self-crossing and backcrossing.

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Abstract

The present invention discloses a method breeding and application of a new recessive dwarf rape. Brassica napus L variety Jinzhou rape No.2 and de nong zheng cheng company-rape No.5 are used as parents for hybridization to obtain F1, F1 is bagged for selfing breeding to obtain segregating populations. By many years of in-field phenotypic characterization of the segregating populations, a dwarf single plant with excellent comprehensive agronomic traits and quality is selected for continuous selfing breeding for many years to breed a dwarf strain with stable dwarf trait. The dwarf material is used for hybridization with a high material, multi-generation joint analysis finds that the dwarf trait of the rape are controlled by two pairs of additive-dominance-epistatic main gene and additive-dominance-epistatic polygene, and the dwarf trait is recessive. The new dwarf material is used for hybridization with the high material to breed a semi-dwarf anti-lodging new rape variety, and the yield per unit can be significantly improved.

Description

technical field [0001] The invention relates to the technical field of rapeseed breeding, in particular to a breeding method and application of a novel recessive dwarf rapeseed. Background technique [0002] Brassica napus belongs to the Brassicaceae ( Cruciferae ) Brassica ( brassica ), is the second largest bulk oil crop in the world, not only the main source of edible oil, but also an important economic crop that provides biodiesel and other industrial raw materials. China's annual planting area exceeds 7 million hectares (100 million mu), and the rapeseed output exceeds 10 million tons, ranking first in the world in both area and total output. In recent years, the gap between domestic supply and demand has been increasing. In 2014, under the condition of controlling the import volume, the import volume of rapeseed was as high as 5.081 million tons, and the rapeseed oil was 810,000 tons. It has become the world's major rapeseed importer. As the population continues to...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01H1/02A01H1/04
CPCA01H1/02A01H1/04
Inventor 向阳杜才富秦信蓉喻时周张星星张涛张敏琴
Owner 贵州省油菜研究所
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