Breeding method of main-inflorescence multi-silique brassica napus type conventional rape variety

Abstract

The invention discloses a breeding method of a main-inflorescence multi-silique brassica napus type conventional rape variety. The breeding method comprises the following steps: (A) carrying out hybridization by taking main-inflorescence multi-silique brassica napus type rape CGMCC NO.12262 as a male parent and brassica napus type rape strain as a female parent, thus obtaining hybrid progeny F1; (B) carrying out backcrossing by taking the hybrid progeny F1 as a non-recurrent parent and the brassica napus type rape strain as a recurrent parent, thus obtaining backcross progeny; (C) carrying out backcrossing by taking the backcross progeny as a non-recurrent parent and the brassica napus type rape strain as a recurrent parent, thus obtaining backcross progeny; (D) carrying out self-cross on the backcross progeny, thus obtaining the main-inflorescence multi-silique brassica napus type conventional rape variety. Conventional rape varieties having the character of having multiple siliques on the main inflorescence can be bred by utilizing the breeding method disclosed by the invention, and the conventional rape varieties can be used as rape varieties which are suitable for simplified and high-density planting.

Description

technical field [0001] The invention belongs to the field of rapeseed breeding, and relates to a method for breeding conventional rapeseed varieties of the main inflorescence polygonal cabbage type. Background technique [0002] my country is a major producer of rapeseed, but in recent years, the planting area and total output of rapeseed have continued to decline sharply, and the low degree of mechanization is one of the main reasons. In order to fully realize light simplified cultivation and mechanized harvesting of rapeseed, it is necessary not only to improve the cultivation technology, but more importantly, to make a breakthrough in the selection of rapeseed varieties suitable for light simplified cultivation and mechanized harvesting. [0003] Adapting to high-density planting is one of the characteristics that rapeseed varieties suitable for light and simplified cultivation and mechanized harvesting should possess. Some studies believe that with the increase of plant...

AI Technical Summary

Problems solved by technology

But for a long time, due to natural selection and evolution and other reasons, rape has formed the species characteristics that the density of main inflorescence knots generally does not exceed 1.5 / cm, and the number of main inflorescence knots generally does not exceed 120. Therefore, it is difficult to rely on conventional breeding materials and methods. Breeding Rapeseed Varieties with Polygonal Main Inflorescence

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