Breeding method of new strain of sweet-waxy recessive gene corn selfing line

Abstract

The invention belongs to the technical field of corn breeding and particularly relates to a breeding method of a new strain of a sweet-waxy recessive gene corn selfing line. The breeding method of thenew strain of the high-quality, multi-resistant and high-reassortant corn selfing line with super-sweet and waxy double-recessivity utilizes a waxy corn strain NB group synthesized by nine excellentwaxy corn materials and a super-sweet and waxy corn added combined flower sweet-waxy 179 hybrid containing a super-sweet gene (sh2 / sh2) as basic materials for line selection, uses a pedigree method and a molecular marker to assist directional selection of selfing single plants having excellent comprehensive characters and containing super-sweet and waxy double-recessive genes and breeds a new cornselfing strain WT1791 having super-sweet and waxy double-recessivity (sh2 / sh2 and wx / wx). The WT1791 obtained through the breeding method has the advantages of appropriate growth period, higher yield, good cooperation property and good comprehensive resistance.

Description

technical field [0001] The invention belongs to the technical field of corn breeding, and in particular relates to a breeding method for a new corn inbred line with a sweet and waxy recessive gene. Background technique [0002] Waxy corn is a subspecies of corn that originated in Southwest China. In the 21st century, my country's waxy corn production has developed rapidly driven by urban consumption. The national waxy corn planting area exceeds 10 million mu, of which 6 million mu is used as fresh food. The breadth and depth of breeding have also been greatly improved. , especially in the breeding of fresh waxy corn varieties, has been in the leading position in the world, and has bred a large number of new varieties of high-quality waxy corn, such as Suyunuo 1, Jingkenuo 2000, Zhengbainuo 1 and other varieties, but Due to the long-term neglect of the quality improvement of fresh edible waxy corn varieties, fresh edible waxy corn varieties generally have disadvantages such as...

AI Technical Summary

Problems solved by technology

In the 21st century, my country's waxy corn production has developed rapidly driven by urban consumption. The national waxy corn planting area exceeds 10 million mu, of which 6 million mu is used as fresh food. The breadth and depth of breeding have also been greatly improved. , especially in the breeding of fresh waxy corn varieties, has been in the leading position in the world, and has bred a large number of new varieties of high-quality waxy corn, such as Suyunuo 1, Jingkenuo 2000, Zhengbainuo 1 and other varieties, but Due to long-term neglect of the quality improvement of fresh edible waxy corn varieties, fresh edible waxy corn varieties generally have disadvantages such as low variety grade, single product type, low yield, poor taste, and uneven processing quality.

Due to the narrow genetic basis of germplasm, the local farm varieties have better fresh food quality, but the yield is low; the varieties introduced in the temperate zone are not suitable for the high temperature and high humidity environmental conditions in tropical and subtropical regions, and have poor disease resistance and stable yield. Most of the waxy corn hybrids bred so far are still far behind the foreign varieties in terms of quality, and mainly have problems such as poor uniformity, thick skin and slag, waxy degradation, and poor flavor and taste.