Seed selection and hybridized variety production method of sabbage type rape micropowder less cytoplasam male sterile series

Abstract

A method for selectively breeding the crossed cabbage-type rape includes such steps as crossing between European rape ledos and Chinese rape Shuang No.2 to obtain sterile line, back crossing with Chinese rape Shuang No.2 to obtain non-micropollen sterile line and relative maintenance line, copmlex crossing to obtain restoring line, and diallel crossing to obtain Shanyou No.6 and No.8, which feature high yield.

Description

technical field

[0001] The invention belongs to agricultural rapeseed heterosis utilization technology, and relates to a method for selecting and breeding a non-micronized type cytoplasmic male sterile line of Brassica napus and producing a hybrid. Background technique

[0002] There are many ways to utilize heterosis in rapeseed, mainly including cytoplasmic sterile hybrids, nuclear sterile hybrids, chemical killing hybrids and self-incompatibility hybrids. At present, three cytoplasmic sterile lines (ie, sterile lines, maintainer lines, and restorer lines) are mainly used to produce hybrids. The cytoplasmic male sterile lines of rape found at home and abroad mainly include Polima CMS, Shan 2A, Ogu CMS, nap CMS, nig CMS, mur CMS, MI CMS, Nca, and RM5637. Polima CMS is a natural male sterile strain discovered by Professor Fu Tingdong in Polish Brassica napus Polima in 1972. According to its performance, it can be divided into high-temperature sterile type, low-temperature s...