A method for the efficient crossbreeding of new varieties of long cowpea in two years and six generations in situ

Abstract

A method for efficient crossbreeding of new varieties of long cowpea in two years and six generations in situ. The method is to have a certain number of hybrid parent materials, and to check the genetic relationship between the parent materials, the biological characteristics of the materials, and the ripeness. It is carried out on the basis of the preliminary work with a certain understanding of the nature and synergistic ability; one is to use the three cultivation modes of open field, plastic greenhouse and solar greenhouse cultivation; Realize the breeding mode of two years and six generations in situ, which shortens the breeding time by 33.3%-66.7% compared with the traditional two-year two-generation and two-year four-generation methods; in terms of breeding methods, the traditional mixed selection method and pedigree method Combining and improving, taking into account the characteristics of selecting the best from the wide and selecting the best from the best, the F1 and F2 generations are mixed, and the F3 is selected for single plant selection until the target variety is selected.

Description

technical field [0001] The invention relates to the field of long cowpea breeding, in particular to a method for efficiently hybridizing and breeding new varieties of long cowpea for two years and six generations in situ. Background technique [0002] Cowpea is a worldwide crop, originated in tropical Africa, and is divided into two types: beans and pods. Long cowpea, commonly known as long bean, is the main type of pod-eating cowpea. my country is the secondary origin center and diversity center of long cowpea, with rich germplasm and a long planting history. Compared with other vegetables, long cowpea is rich in protein and dietary fiber unique to legume vegetables. It is rich in nutrition and has high health care value. It is an important vegetable in people's life. [0003] Long cowpea is a strictly self-pollinated crop, with the characteristics of low hybrid pod setting rate, small number of single-flower hybrid seeds, high cost of artificial hybridization, and hybrids...

AI Technical Summary

Problems solved by technology

[0003] Long cowpea is a strictly self-pollinated crop, with the characteristics of low hybridization pod setting rate, small number of single-flower hybridization seeds, high artificial hybridization cost, and hybrids that cannot be used in production. Therefore, new varieties are systematically selected after sexual hybridization , is still the main technical approach for long cowpea breeding. Compared with many other vegetable crops with mature breeding technology, the technology integration of long cowpea hybrid breeding is not enough, and there are few efficient new variety breeding systems, and there are varieties of long cowpea in production. A series of problems that restrict development and do not meet market demand, such as slow production, insufficient varieties, low coverage of improved varieties, serious degradation of varieties, and inability to guarantee farmers' planting benefits