Selecting method of conventional breeding of wheat

Abstract

The present invention relates to conventional 'plant spike' selecting wheat breeding process, and belongs to the field of flowering plant improving technology. The conventional plant spike selecting wheat breeding process developed on the basis of available bulk method, pedigree method and other breeding method includes mixed seeding of F2 and F3 generation seeds, and simultaneous target selecting and semi-random selecting to select 'plant spike'; mixed harvesting of the selected 'plant spike'; forming identifying subzone of F4 generation grouping, identifying the combined yield, etc and selecting single plant in the subzone simultaneously; evaluating and selecting grouping and selecting single plant; strain planting of the F5 generation, and selecting single plant and strain; and the subsequent homogeneous pedigree process. Compared with available breeding methods, the present invention has low cost, saving in time and high probability of obtaining excellent variety.

Description

[0001] (1) Technical field The present invention relates to a process for improving phenotypes of flowering plants, in particular to a selection method for gramineous crops-wheat conventional breeding. (two), background technology [0002] Breeding methods play a very important role in breeding results. Conventional breeding has been the most important wheat breeding method. So far, the vast majority of fine varieties are bred by conventional breeding. Its basic methods include genealogical method and hybrid method, and there are many methods derived from these two methods. Brief technical solutions and characteristics of some main and representative methods are: [0003] 1. Pedigree method: parent × parent → F 1 : plant by combination → F 2 : Sparse planting according to the combination, select a single plant in the combination (according to the target)→F 3 : Rarely plant according to the line, select a single plant from the line → F 4 : Rarely plant according to the li...

AI Technical Summary

Problems solved by technology

Its disadvantages are: randomness and natural selection are too strong, relatively few genotypes of target traits, and relatively long breeding years

Its disadvantages are: randomness, strong natural selection, relatively few genotypes of target traits; relatively long breeding period; easy to lose genotypes; generally only one generation of individual plants is selected, and more individual plants and strains, there are many strains participating in the test, and the burden of later selection is heavy

Its disadvantages are: the operation is more complicated; the variation types retained are also less; the remaining population (community) may have a large deviation in the yield estimation of the selected strain

But the breeding period is relatively long

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