Germplasm Improvement and Breeding Technology System of Gradual Classification of Heterogenetic Groups of Fresh Maize

Abstract

The invention discloses a germplasm improvement and breeding technology system of step-by-step classification of heterozygous groups of fresh-eating corn, including selection of excellent germplasm and hybrids of the initial population, selection of resistance, double haploid breeding, DH line testing, combining ability determination, DH line is used in breeding and assembling the second cycle of the original population and other steps. The present invention advocates the reincarnation selection of multi-pest resistance, lodging resistance, quality, yield, etc. under multi-ecological conditions, and performs group exchange and mutual combination to aggregate good genes such as high-quality, high-yield, multi-resistance, and wide-adaptation. , so that the excellent characteristics of the population are gradually accumulated, and the breeding performance is gradually improved.

Description

technical field [0001] The invention relates to a germplasm improvement and breeding technology system of step-by-step classification of heterozygous groups of fresh corn. Background technique [0002] Fresh corn is a new growth point of my country's economy, and its area and benefits have expanded rapidly in the past 10 years. At present, the area of ​​waxy corn, sweet corn, and sweet-waxy combined corn in my country has reached about 1.17 million ha, of which waxy corn is about 660,000 ha, of which 1 / 3 is for grain, 2 / 3 is fresh food, sweet corn is about 440,000 ha, and sweet corn is about 440,000 ha. Waxy combined corn reaches about 70,000 ha. The production of fresh corn needs to be planted all year round to supply the market in a balanced manner, and the outbreak of rough dwarf disease will cause the planting fields to fail in the season of the disease. Generally, the year of occurrence will greatly reduce production and reduce the commodity rate, threatening the effici...

AI Technical Summary

Problems solved by technology

[0003] At present, there is no unified heterosis group and heterosis mode in the breeding of fresh edible waxy corn in China. The breeding method has also developed from the common corn backcross transfer method to the use of common corn germplasm hybridization to improve a certain trait gene, and gradually developed to The breeding stage of mutual improvement by using fresh corn inbred lines such as glutinous and sweet