Breeding method for 50% male sterile line of oat

Abstract

The invention belongs to the technical field of plant breeding and provides a breeding method for a 50% male sterile line of oat to transform a variety of novel sterile materials and to overcome the problems that an original CA male sterile strain is only applicable to preparation of early-maturing hybrid combination due to a low outcrossing rate and a short growth period and only applicable to preparation of lodging-resistant hybridization combination due to its shortness. According to the invention, the original CA male sterile strain is used as a female parent, and varieties of different types are used as male parents so as to obtain an F1 generation; an oat male sterile strain is used as a female parent, the F1 generation is used as a male parent, and hybridization is carried out to obtain an F2 generation; sterile strains and fertile strains in the colony of the F2 generation are hybridized so as to obtain the 50% male sterile line of oat, and above-mentioned operation is repeatedly carried out so as to obtain a 1 / 2 sterile colony with different target properties and different characteristics. The original CA male sterile strain is reconstructed so as to transform a variety of novel sterile materials, a separation ratio of the sterile strains to the fertile strains in the colony is 1:1, and a foundation is laid for creation of a later-generation selection colony with rich hereditary bases and for cultivation of novel oat varieties of different types.

Description

technical field [0001] The invention belongs to the technical field of plant breeding, and in particular relates to a method for breeding 50% oat male sterile lines. Background technique [0002] Oats are generally divided into two categories: lemma type and naked type. The oats cultivated in various countries in the world are mainly of the lemma type, often called skin oats. The oats cultivated in our country are mainly naked oats, often called naked oats. There are many aliases for naked oats, which are called naked oats in North China; jade wheat in northwest China; oats in southwest China, sometimes also naked oats; Naked oats, commonly known as naked oats, is a cultivated species of oats. The proportion of food crops in my country is very small, and it is mainly distributed in high-altitude areas in the north. [0003] Male sterility is a special survival mode in the evolution of plants, especially self-pollinating plants. It forces plants to accept foreign pollen, ...

AI Technical Summary

Problems solved by technology

[0005] The main problems of the original CA oat male sterile plants are as follows: low outcrossing rate: due to the characteristics of the ear structure of oat itself: the branches are slender, and the weight of the spikelet itself makes the spikelets after heading downward The hanging state makes it difficult for the sterile plants to accept foreign pollen, so the rate of outcrossing is low

Short growth period: only suitable for the preparation of early-maturing hybrid combinations