Ultra high-oil rapeseed germplasm and breed selection method of high-oil hybrid thereof

Abstract

The invention discloses an ultra high-oil rapeseed germplasm and a breed selection method of high-oil hybrid thereof. The method adopts polymerization breeding, ecological breeding and yellow seed breeding, the three are effectively combined and merged to be utilized, so as to obtain high-oil and ultra high-oil germplasm material, and then breeding mode of high oil plus chemical killing is utilized to realize culture of a new rape hybrid with high oil, high yield and high quality; by adopting the method of the invention, obvious high oil breeding effect is obtained, oil content of the ultra high-oil germplasm reaches 59.1-61.4%, and the oil content of a double low high quality rape hybrid reaches 50.12-54.4%. 'Qinyou 33' double low high quality rape hybrid is successfully obtained by breed selection, the oil content is 47.77%, which is the highest oil content since variety test starts in Huanghuai region, and the breed passes national certification in September 2008 and is demonstrated and popularized in the Huanghuai region; and more than 50% of selected hybrids are in national test.

Description

technical field [0001] The invention belongs to the field of agriculture and the breeding of rapeseed with extra-high oil content and hybrids, in particular to a breeding method of rapeseed with extra-high oil content and its high-oil hybrids. Background technique [0002] In the early 1980s, my country successfully solved the use of heterosis in rapeseed, and bred the world's first hybrid rapeseed variety Qinyou No. 2, which was successfully used in production, and was promoted in 12 provinces in the Huanghuai and Yangtze River basins of my country. In the 1990s, the high-quality single and double low (low erucic acid, low glucosinolate) varieties bred in my country were high-quality. Rapeseed varieties have been applied in production one after another, but most of the high-quality varieties bred in the early stage have the problems of low yield, late maturity, and poor disease resistance. Therefore, experts proposed the technical route of using mixed high-quality + high-qual...

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Problems solved by technology

After analysis and research, the applicant believes that it is more difficult to increase the yield of rapeseed. Due to the successful promotion of rapeseed hybrids, its yield has reached more than 250kg / mu, but there is still great potential and great room for growth in the improvement of oil content. , so the applicant has listed the selection of high oil content as one of his important breeding goals since the early 1990s

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