A hybrid breeding method for new germplasm of triticale for forage

Abstract

The invention relates to a method for hybrid breeding of new germplasm of feed triticale. In a breeding process, screening of selection periods, agronomic traits and stress resistance is emphasized, traits including plant types, plant heights, tiller numbers, leaf traits, the ear-bearing rate, the fruiting rate, lodging resistance, disease resistance and the like are expressed quantitatively, population sizes, planting density and field layout of each generation of new germplasm of feed triticale are defined, and accordingly field operation in progeny selection is facilitated, and manpower andmaterial resources are saved. More importantly, quantitative and accurate expression of the agronomic traits, resistance and the like in progeny selection is realized, so that high accuracy and highefficiency in progeny selection are realized, blindness in selection is avoided, and waste of human and financial resources is avoided.

Description

technical field [0001] The invention belongs to the field of grass variety breeding, in particular to a method for breeding triticale varieties for forage. Background technique [0002] Triticale is the world's first artificially created new species. It is a new type of wheat grain crop that is bred by intergenus hybridization of wheat and rye and the application of chromosome engineering breeding methods. In 1876, the British Wilson first reported the successful hybridization of wheat and rye, and obtained the news of completely sterile hybrid plants. In 1935, Tschermak officially named the hybrid of wheat and rye as triticale on the basis of summarizing previous research. In 1969, L.H.Shebeski, B.C.Jankins and E.N.Larter of the University of Manitoba, Canada jointly bred the first registered hexaploid triticale variety Rosner. Countries with large triticale planting areas in the world include Poland, the former Soviet Union, Germany, the United States, Australia, France,...

AI Technical Summary

Problems solved by technology

There are a series of problems in the breeding methods reported above: 1) The method description is not comprehensive enough, and lacks technical content such as parent selection standards and specific emasculation methods

2) The shape selection of field agronomy has only qualitative description and lack of quantification; for example, there are no quantitative indicators for tillering spike rate and plant height, and it is difficult to grasp the field implementation

3) The number of populations in different generations is uncertain; the size of the population has a significant impact on the selection of forage triticale progeny, if the population is too small, the genetic separation of offspring is insufficient, and the probability of screening good offspring materials is small; if the population is too large, a large number of experimental sites are required , a waste of financial and material resources

4) The planting method in the field is not clear, and the arrangement method is not accurately quantified; the specific row length / plant spacing is not clear

If the distance between plants is too large, the experimental space will be wasted; if the distance between plants is too small, it will hinder individual development

5) The method of selection and retention of offspring is not clear; for example, the selection period of offspring, the number of selected plants, and whether the harvesting method is single plant harvesting or mixed harvesting are not clear

[0005] Invention patents related to triticale include "A Method for Identifying Resistance to Yellow Dwarf Disease in Triticale", which only specifies a method for identifying resistance to yellow dwarf disease in triticale, which belongs to the triticale The disease resistance identification method can identify the resistance of hundreds of triticale materials to all the local yellow dwarf virus strains at one time. It has strong pertinence, high detection efficiency and good accuracy. Selection of germplasm is not relevant

[0006] In addition, there is a shortage of forage triticale germplasm resources, and it is difficult to introduce new germplasm for hybrid breeding, so we can only carry out hybridization independent innovation through existing germplasm resources

Since forage triticale is mainly used for animal feed, the main goal of breeding is to obtain new germplasm with high biomass. Breeding methods can be used for reference, only 2 papers did not specify the specific breeding technology, and there is no invention plan in this regard for reference

Images