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Method for selective cultivation of three systems of sytoplasmic male stirility rape by early generation concerned

A technology of male sterility in Brassica napus, which is applied in the fields of botany equipment and methods, application, plant gene improvement, etc., can solve the problems of unbalanced interaction and long cycle, so as to reduce workload, reduce manpower, and improve selection. The effect of reproductive efficiency

Inactive Publication Date: 2006-08-16
成都市第二农业科学研究所
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Problems solved by technology

The main defects of these methods are: the cycle is long, the interaction between the three lines is not taken into account in the breeding process, and the combining ability between the sterile line and the restorer line can only be judged and selected after the breeding is completed and tested.

Method used

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  • Method for selective cultivation of three systems of sytoplasmic male stirility rape by early generation concerned

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Embodiment Construction

[0018] see figure 1 : the present embodiment method comprises the steps:

[0019] 1. Use the source of genetic diversification to select from the basic stereotyped materials of fertility and agronomic traits to form the maintenance material group Bi and the restoration material group Cj.

[0020] 2. Prepare test cross group BiCj by diallel cross, and keep material Bi and sterile material A to prepare test cross group Ai.

[0021] 3. Conduct field experiments on the BiCj group with design methods such as the interval ratio method, comprehensively evaluate the performance of yield, resistance, quality, and growth period traits of each combination, refer to the production of the main hybrid varieties, and determine through the comprehensive analysis results of various traits of each combination The excellent maintainer line Bi' and the excellent restorer line Cj'; the first round of screening (maintenance ability) was carried out on Bi based on the fertility performance of Ai, a...

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Abstract

An early generation association method for testing and choosing the three cytoplasmic male sterile lines of cabbage-type rape includes such steps as diallel crossing between the maintainer materials and restoring materials to choose the paired lines and reject the maintainer lines and restoring lines which have low combining ability, screening the maintainer materials by maintenance effect, screening the maintainer materials again by their interactive performance, and backcrossing between the chosen maintainer line to culture excellent sterile line As a result, three excellent lines are crossed to obtain the crossed rape with strong dominance.

Description

Technical field: [0001] The invention belongs to the field of heterosis utilization of Brassica napus, and relates to an early, efficient, systematic and associated method for detecting and selecting three cytoplasmic male sterile lines of Brassica napus and further breeding a new variety of strong dominant hybrid rapeseed. Background technique: [0002] my country is the world's largest rapeseed producer. In 2004, the cultivated area of ​​rapeseed was about 7 million hectares, with a total output of 13.04 million tons, accounting for about 1 / 3 of the world's total area and total output. [0003] Rapeseed has significant heterosis, and hybrid varieties have occupied a dominant position in rapeseed production in my country. Rapeseed heterosis utilizes the existing methods such as qualitative sterility, nuclear sterility, self-incompatibility, chemical male killing, natural hybrids, and synthetic hybrids. [0004] The sterility of the rapeseed nuclear sterility route is thoro...

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Application Information

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IPC IPC(8): A01H1/02A01H1/04
Inventor 莫鉴国李万渠余勤彭云强
Owner 成都市第二农业科学研究所
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