A kind of breeding method of new material of non-branched rapeseed

Abstract

The invention discloses a method for selectively cultivating a novel rapeseed material without branches. The method includes steps of utilizing Chinese Twin 11 as wood, utilizing 506C as male parents and carrying out hybridization; carrying out successive selfing from a second year to a fifth year for four generations, analyzing the quality in laboratories, carrying out autumn sowing on selected single plants with the erucic acid contents lower than 1% and the glucosinolates contents lower than 30 micro-mol / g in autumns and carrying out the same procedures until the fifth year; discovering totally 399 plants, including 342 normal rapeseed plants, 43 rapeseed plants with few branches and 14 rapeseed plants without branches, of two pedigrees by means of selfing in the fifth year and carrying out selfing on rapeseed with the few branches and rapeseed without the branches in the current year; carrying out selfing on rapeseed without branches from the fifth year to a seventh year and carrying out selfing homozygosis on the novel rapeseed material without the branches in the seventh year. The field number of the novel rapeseed material is 697, the plant height is 84 cm, each single plant has 42 siliques, and the weight of every one thousand siliques is 4.9 g. The method has the advantages that the erucic acid content of the novel rapeseed material is 0.24%, the glucosinolates content of the novel rapeseed material is 18.21 micro-mol / g, and the oil content of the novel rapeseed material is 50.23%; the novel rapeseed material without the branches is hereditary.

Description

technical field [0001] The invention belongs to the technical field of agriculture, and in particular relates to a breeding method for a new material of unbranched rape. Background technique [0002] The rapeseed plants currently cultivated in my country are relatively high, with a general plant height of 170-200cm, 8-12 effective branches at a time, 25-30 days of flowering, 250-400 siliques per plant, and a thousand-grain weight of 3.2-3.8g. It is easy to lodging, and the maturity period is inconsistent, which is not conducive to mechanized sowing and harvesting. SUMMARY OF THE INVENTION [0003] The object of the present invention is to provide a kind of breeding method of unbranched rapeseed new material, the unbranched rapeseed selected by this method has no branches when mature, only the main inflorescence blooms and siliques, and the plants are short and generally tall. 80-100cm, flowering period is 7-10 days, the number of siliques per plant is about 40, the thousan...

AI Technical Summary

Problems solved by technology

[0002] The rape plants currently cultivated in my country are relatively tall, with a general plant height of 170-200cm, an effective branch number of 8-12, a flowering period of 25-30 days, a single plant of 250-400 siliques, and a thousand-grain weight of 3.2-3.8g. Easy to lodging, inconsistent maturity, not conducive to mechanized sowing and harvesting

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