Method for breeding new varieties of wheat

Abstract

The invention discloses a method for breeding new wheat variety, comprising following step: (1) selecting rye as female parent, low- medium stalk and high- quantity normal wheat as male parent, emasculating female parent artificially, pollinating male parent artificially repeatedly, preparing distant hybrid combination, and culturing distant first-filial generation; (2) taking distant first-filial generation as female parent, taking large panicle and disease-resistant normal wheat as male parent for second time hydration, getting second- time first-filial generation; (3) mutating seed of second- time first-filial generation with cobalt 60; (4) irradiating treated second- time first-filial generation for autocopulation of fourth generation; (5) selecting short stalk, large panicle and disease- resistant single plant from second- fourth generation got in step (4) to hybrid with wheat with complementary property, getting third time first-filial generation; (6) selecting short stalk, large panicle, disease- resistant, high- output single plant as breeding target, autocopulating the third time first-filial generation for five generations continuously, breeding and getting new short stalk, large panicle, disease- resistant, high- output wheat variety.

Description

technical field [0001] The invention belongs to the technical field of wheat breeding and relates to a method for cultivating new wheat varieties. Background technique [0002] Henan Province is a major wheat producing province in my country. The planting area accounts for about 1 / 5 of the country's total output and the total output accounts for 1 / 4 of the country's total. changes, the damage of diseases and insect pests has increased, and lodging has occurred seriously. The wheat varieties originally planted in large areas were unable to meet the requirements of production development due to disease susceptibility, high stalks, and low yield levels. In the late 1980s, due to the extremely The emergence of a new physiological race of stripe rust dominated by No. 29 in Qiangtiaozhong has caused many new varieties (lines) bred by using European "Luo" varieties as resistance sources to lose their resistance. In addition, the original non-important disease Such as powdery mildew, ...

AI Technical Summary

Problems solved by technology

[0002] Henan Province is a major wheat producing province in my country. The planting area accounts for about 1 / 5 of the country's total output and the total output accounts for 1 / 4 of the country's total. changes, the damage of diseases and insect pests has increased, and lodging has occurred seriously. The wheat varieties originally planted in large areas were unable to meet the requirements of production development due to disease susceptibility, high stalks, and low yield levels. In the late 1980s, due to the extremely The emergence of a new physiological race of stripe rust dominated by No. 29 in Qiangtiaozhong has caused many new varieties (lines) bred by using European "Luo" varieties as resistance sources to lose their resistance. In addition, the original non-important disease Such as powdery mildew, leaf rust, leaf blight, etc. have also risen as major diseases

On the other hand, at home and abroad, the technical methods of hybrid improvement and breeding of new varieties between common wheat varieties are mostly used. Due to the small genetic differences between common wheat varieties, many improved varieties have the same or similar parental sources, resulting in the breeding of varieties. The genetic basis is narrow, and the segregation of offspring is small and the types are narrow

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