A Synthetic Method of Primitive Population for Maize Breeding for Reciprocal Recurrent Selection

Abstract

The invention discloses a synthetic method of an original colony for corn breeding for reciprocal recurrent selection, belonging to the technical field of corn breeding, which solves the problem that existing gene linkage degree is high and germplasm resources are relatively narrow. The method comprises the following steps: first, selecting a plurality of selfing line materials with relatively wide hereditary basis and high common combining ability in a same class group; carrying out variance analysis and F index inspect among combining abilities of the materials based on an NCII mating designed test of an AMMI (Additive Main effects and Multiplicative Interaction) model to analyze hereditary effects; assembling incomplete diallel cross combination by using the materials; and assembling a top cross specie according to the non-overlapping principle of germplasm complementation, and after equivalently and uniformly mixing seeds of the top cross, continuously and fully mixing pollen twice to pollinate, wherein the seed obtained by the manner is the original colony for corn breeding. The synthetic method disclosed by the invention can break linkage in the same group to create variation, thereby providing an abundant material basis for recurrent selection and selfing line breeding.

Description

technical field [0001] The invention relates to the technical field of corn breeding, in particular to a method for synthesizing an original population for corn breeding used for mutual recurrent selection. Background technique [0002] Maize is the crop that utilizes heterosis earlier and has the largest area in the world. In the long-term practice of maize breeding in my country, the problem of narrow germplasm base has always been concerned. The basic material is composed of two inbred lines, and the two-ring Line selection technology and pedigree method to carry out maize inbred line selection is a traditional breeding technology method, which also leads to a narrow germplasm base. my country is not the birthplace of maize, the germplasm resources are scarce, and the germplasm base is relatively narrow. The United States is the most developed country in corn research and corn industry in the world. The United States has proved through more than 80 years of continuous imp...

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Problems solved by technology

[0002] Maize is the crop that utilizes heterosis earlier and has the largest area in the world. In the long-term practice of maize breeding in my country, the problem of narrow germplasm base has always been concerned. The basic material is composed of two inbred lines, and the two-ring Line selection technology and pedigree method to carry out maize inbred line selection is a traditional breeding technology method, which also leads to a narrow germplasm base

The existing backbone inbred lines of maize in my country are precious wealth for the innovative practice of maize breeding, and the degree of genetic linkage is relatively high. There are rare reports on the synthesis and improvement of the inbred lines of the most commonly used taxa in my country, especially those that can completely break the linkage through design. Synthetic methods are rarely reported

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