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Breeding method for superstrong cold-resistant high yield and oil content brassia campestris L. variety

A cabbage-type winter rapeseed, high-yield technology, applied in the directions of botanical equipment and methods, applications, plant genetic improvement, etc., can solve the problems of winter winter rapeseed varieties difficult to overwinter, harsh ecological environment, severe cold climate, etc., and achieves little blindness. , huge economic benefits, simple effect of breeding process

Active Publication Date: 2015-10-21
GANSU AGRI UNIV
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AI Technical Summary

Problems solved by technology

[0003] However, the northern region is windy in winter and spring, with large evaporation, severe cold and arid climate, and harsh ecological environment. It is difficult to survive the winter, so the selection and breeding of winter rapeseed varieties with excellent cold resistance is the primary problem in the development of winter rapeseed production in this region

Method used

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  • Breeding method for superstrong cold-resistant high yield and oil content brassia campestris L. variety
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  • Breeding method for superstrong cold-resistant high yield and oil content brassia campestris L. variety

Examples

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Embodiment 1

[0028] Example 1: Breeding of rapeseed "Longyou No. 7" (MXW-1) with strong winter resistance, the breeding process is as follows figure 1 shown.

[0029] 1) In late April 1996, Chenjiazui rape with strong cold resistance was used as the female parent, and Tianyou No. 1 with high yield was used as the male parent, and the hybrid combination was combined to obtain the F1 generation;

[0030] 2) 1996-1997: In the autumn of 1996 (late August), F1 was sown in Lanzhou; the hybrid F1 was placed in a low-temperature artificial climate chamber at -15°C for 120 hours, and then the low temperature stress was gradually relieved. Under the natural conditions of Lanzhou winter (-20 ~-30°C) overwintering, select surviving cold-resistant individual plants; in late April 1997, bagged self-crossing was carried out to obtain F2 seeds, and harvested by individual plants. A total of 188 single-plant self-fertilized and free-pollinated seeds were harvested.

[0031] 3) 1997-1998: F2 seeds of 188 l...

Embodiment 2

[0037] Example 2: Breeding of rapeseed "Longyou No. 8" (WYW-1) with strong winter resistance, the breeding process is as follows figure 2 shown.

[0038] 1) In late April 1996, Chenjiazui rape with strong cold resistance was used as the female parent, and Yanyou No. 2 with high yield was used as the male parent to form a hybrid combination.

[0039] 2) 1996-1997: In the autumn of 1996 (late August), F1 was sown in Lanzhou; the hybrid F1 was placed in a low-temperature artificial climate chamber at -15°C for 120 hours, and then the low temperature stress was gradually relieved. Under the natural conditions of Lanzhou winter (-20 ~-30°C) overwintering, select surviving cold-resistant individual plants; in late April 1997, bagged self-crossing was carried out to obtain F2 seeds, and harvested by individual plants. A total of 188 single-plant self-fertilized and free-pollinated seeds were harvested.

[0040]3) 1997-1998: F2 seeds of 178 strains were sown in Jingyuan in the autum...

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Abstract

The invention provides a breeding method for a superstrong cold-resistant high yield and oil content brassia campestris L. variety. A winter nature brassia campestris L. variety is used as female parents, a winter nature brassia campestris L. high yield variety is used as male parents, and F1 generation is obtained through hybridization; a parts of F1 generation are frozen in a low-temperature manual climate room, low-temperature stress is relieved gradually, the parts of F1 generation live through the winter under natural winter conditions, survival cold-resistant single plants are harvested; the rest F1 generation are sown in an evaluation nursery and live through the winter under natural conditions, and single plants living through the winter safely are harvested; the survival cold-resistant single plants are F2 generation; the single plants of the F2 generation are sown in a cold-resistant evaluation nursery and live through the winter under natural conditions, and the single plants living through the winter safely are harvested to obtain F3 generation; F4 generation, F5 generation and F6 generation are sequentially obtained by repeating the process for obtaining the F2 generation; comparison between different strains is carried out from the F6 generation, elite plant strains are selected into the evaluation nursery, and the superstrong cold-resistant high yield and oil content brassia campestris L. variety is obtained. The breeding is simple in breeding process, small in blindness, and high in selection efficiency.

Description

technical field [0001] The invention belongs to the technical field of rapeseed breeding, and relates to a breeding method for super-cold-resistant, high-yield, high-oil-type Chinese cabbage-type winter rape varieties. Background technique [0002] The development of winter rapeseed production in the arid and cold areas of northern my country can not only increase the vegetation coverage in winter and spring, solve the problem of idle farmland in autumn and winter, and avoid the dust source caused by agricultural activities such as autumn plowing and spring sowing, but also due to the high yield, high oil content and early maturity of winter rapeseed, The subsequent stubble is suitable for multiple cropping, and the traditional one cropping a year can be changed to two crops a year or three crops every two years. Therefore, winter rape can not only improve the multiple cropping index and economic benefits per unit land area, but also have significant ecological benefits. [...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01H1/02A01H1/04
Inventor 孙万仓杨刚刘自刚曾秀存武军艳方彦李学才袁金海方圆
Owner GANSU AGRI UNIV
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