A kind of breeding method of the fourth generation of sunflower inbred line Anniversary

Abstract

The invention discloses a breeding method of anniversary four generations of a sunflower selfing line. The biological characteristics of sunflowers, the sunflower selfing line research and current breeding selection situations are utilized, the young embryo breeding technology and the greenhouse seedling breeding technology are combined with field experiment planting, with sunflower field breeding planting as the standard, greenhouse planting is combined, effective accumulative temperature, higher than or equal to 5 DEG C, needed by completing one generation of the sunflower selfing line and illumination are explored, a planting place is selected reasonably, advanced technical means and methods are utilized as technology core guarantees, in 7-10 days after fertilization, embryos are taken out and bred, and the next generation begins to be bred, so that the generation cultivation period is shortened, the breeding method of the anniversary four generations of the sunflower selfing line is set up, the breeding cost is reduced, and the method has a realistic function and significance in the technical field of breeding of the sunflower selfing line.

Description

technical field [0001] The invention relates to the technical field of plant propagation, in particular to the technical field of breeding of sunflower inbred lines. Background technique [0002] sunflower( Enthusiast annuls L. ) is one of the five major oil crops in the world. It has the characteristics of resistance to salt and alkali, drought and barrenness. It is also the main oil crop in northern my country. It is increasingly valued as an oil or protein resource. There are quite a few dry and barren low-yield fields and saline-alkali land in China, so sunflower plays an important role in agricultural production. All countries in the world have generally carried out research on three lines (sterile line, maintainer line, restorer line) in the study of sunflower heterosis utilization. my country has carried out research on three-line sunflower breeding since the 1970s. [0003] At present, my country's sunflower variety resources and inbred line materials used to assem...

AI Technical Summary

Problems solved by technology

[0003] At present, my country's sunflower variety resources and inbred line materials used to assemble three-line hybrids are relatively scarce, with a narrow genetic basis and weak combination advantages. Wild sunflower resources and local varieties are mainly used to hybridize with existing backbone inbred lines. Breeding inbred lines with high quality, disease resistance and wide adaptability, and the use of wild sunflowers often have problems such as self-incompatibility and difficulty in species conservation. In terms of breeding methods, due to limited light and heat resources in the north, breeding materials can only Plant one generation, and then use winter breeding in Hainan to realize the existing two-generation breeding mode of sunflower inbred lines every year. Therefore, it takes at least 3 years to breed a new sunflower inbred line. The breeding process is slow, so speeding up the utilization of high-quality sunflower resources and the selection of excellent sunflower inbred lines to cultivate sunflower inbred lines with excellent traits, disease resistance, and high combining ability are of great significance for enriching the genetic population of sunflower breeding