Hybrid rape breeding method suitable for mechanized production

Abstract

The invention discloses a hybrid rape breeding method suitable for mechanized production. The method comprises the following steps of hybridizing sterile plants in a three-recessive nuclear male sterile line serving as a first-generation female parent with a first-generation male parent with target traits, and selfing hybrid filial generations; hybridizing sterile plants similar to the first-generation male parent in character in the selfing filial generations with the first-generation male parent, selfing the hybrid filial generations, and breeding BCnF2 generation seeds after cycling for multiple times; enabling n to represent the number of times of hybridization of the sterile plants in the selfing filial generations and the first-generation male parent; selfing BCnF2 generations to breed a temporary maintainer line; carrying out BCnF2 generation brother and sister cross to breed a homozygous sterile line; respectively carrying out mass propagation on the homozygous sterile line and a homogeneous temporary maintainer line which accord with the target traits; and hybridizing the homozygous sterile line and the temporary maintainer line, enabling a hybrid filial generation to be a full sterile line, enabling the full sterile line and a restorer line to be hybridized, and obtaining a hybrid rape variety. The sterile plant rate of the full sterile line is 100%, the female parent row ratio and the planting area can be increased, the seed production yield and the seed production efficiency in unit area are improved, and the restorer line is wide.

Description

technical field [0001] The invention relates to the field of rapeseed breeding, in particular to a hybrid rapeseed breeding method suitable for mechanized production. Background technique [0002] At present, the traditional planting method of rapeseed production is to sow according to a certain row ratio (mother: father is 4:2, 5:2 or 6:2). Harvest the male parent before mature harvesting, then cut the female parent, harvest separately, dry separately and then harvest, transport and store separately. In the whole process from sowing to harvesting, the management is very cumbersome, there are many procedures, the cost of seed production is high, and the purity of hybrid seeds is difficult to be guaranteed. [0003] At present, most of the hybrid rapeseed varieties use the Polyma cytoplasmic male sterile three-line system and the nuclear male sterile two-line system to produce hybrid seeds. During the seed production process, the female parent of the Polyma cytoplasmic male...

AI Technical Summary

Problems solved by technology

[0004] In order to overcome the female parent micropowder phenomenon in the three-line seed production process of rapeseed Polyma cytoplasmic male sterile (polMCS) and the female parent of the rapeseed recessive nuclear male sterile (RGMS) two-line sterile system, it is necessary to pull out 50% of the fertile plants problem, the invention provides a hybrid rapeseed breeding method suitable for mechanized production

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