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Breeding Method and Application of Recessive Dwarf Rapeseed

A technology of dwarf rapeseed, which is applied in the breeding field of new recessive dwarf rapeseed, can solve the problems of lodging, yield reduction, high plant height, etc., and achieve the effect of increasing unit yield and solving high plant height

Active Publication Date: 2018-06-26
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 Recessive Dwarf Rapeseed
  • Breeding Method and Application of Recessive Dwarf Rapeseed
  • Breeding Method and Application of Recessive Dwarf Rapeseed

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Embodiment 1

[0017] Embodiment 1 of the present invention: the breeding of novel recessive dwarf rapeseed:

[0018] 1) Hybridization test: the female parent of the Brassica napus variety Jingyou 2 and the male parent of the Brassica napus variety Deyou 5 were used to obtain F 1 , bagging self-breeding to obtain segregated populations;

[0019] 2) Acquisition of a new type of recessive dwarf rapeseed: for 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 80cm Abo...

Embodiment 2

[0020] Embodiment 2 of the present invention: Genetic identification of novel recessive dwarf type traits:

[0021] 1) Dominance and recessiveness of dwarf traits: reciprocal crosses between dwarf materials and tall Brassica napus varieties Zhongshuang 11, F 1 The plants showed similar phenotypes to 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 stem 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 (F1 ×P 2 ), to construct a 6-generation population (P 1 ,P 2 , F 1 , ...

Embodiment 3

[0023] Embodiment 3 of the present invention: Utilize the application of novel recessive dwarf rapeseed to breed 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 invention discloses a breeding method and application of a novel recessive dwarf rapeseed. In the invention, the Brassica napus varieties Jingyou No. 2 and Deyou No. 5 are used as parents to hybridize to obtain F1, and bagged and self-bred to obtain segregated populations. The field phenotypic characteristics of the isolated populations were identified for many years, and dwarf plants with comprehensive agronomic characteristics and excellent quality were selected from them, and self-propagated for many years to breed dwarf strains with stable dwarf traits. The dwarf material was crossed with the tall material, and multi-generation joint analysis was carried out, and it was found that the dwarf traits of rapeseed were controlled by two pairs of plus-significant-epistatic major genes + plus-significant-epistatic polygenes, and the dwarf traits were recessive. By using the new dwarf material and tall material to hybridize, new varieties of semi-dwarf and lodging-resistant rapeseed can be bred, and the yield per unit area can be greatly increased.

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 Patents(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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