Method for selective breeding middle-late-maturing high-yield hybrid corn

Abstract

The invention discloses a method for selective breeding middle-late-maturing high-yield hybrid corn, the excellent middle-late-maturing hybrid corn with high yield, high quality, strong stress resistance and good adaptability is bred by crossing T0278 as the female parent and T0270 as the male parent. The excellent hybrid corn selective bred by using the invention with a yield increase of more than 5% relative to the main hybrid corn at present, has the advantages of uniform filaments, strong viability, high maturing rate and good anther dehiscence of tassel. The spring sowing growth duration in Liaoning Province of the hybrid corn is about 133 days, which is one day later than Zhengdan 958, so that the needed effective accumulated temperature is about 2865 DEG C. The hybrid corn has tough and tensile stalk, developed root system, lodging resistance, strong drought resistance, mature stalk, and high and stable yield, which is a middle-late-maturing corn suitable for growing in Shenyang, Tieling, Jinzhou, Chaoyang, Fuxin, Liaoyang, Dandong in Liaoning Province and other regions.

Description

technical field [0001] The invention relates to a method for breeding mid-to-late maturity and high-yield corn hybrids. Background technique [0002] In recent years, the planting area of ​​corn has been increasing. As one of the main food crops in my country, corn plays an important role in adjusting people's diversified food structure and developing the breeding industry. [0003] However, due to the differences in ecological environment and climate conditions, the yield of hybrid maize and parent breeding and seed production is low, which affects the expansion and promotion of hybrid maize. [0004] Generally, the planting density of hybrid corn species is about 3000 plants / mu, which restricts the further improvement of corn yield. [0005] Moreover, due to the impact of the climate, disastrous weather has occurred frequently in recent years. In recent years, there have been droughts in different regions of northern China almost every year. The area of ​​arid and semi-ar...

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Problems solved by technology

[0003] However, due to the differences in ecological environment and climate conditions, the yield of hybrid corn and its parent breeding and seed production is low, which affects the expansion and promotion of hybrid corn

[0004] Generally, the planting density of hybrid corn species is about 3000 plants / mu, which restricts the further increase of corn yield

[0005] Moreover, affected by the climate, disastrous weather has occurred frequently in recent years. In recent years, there have been droughts in different regions in northern China almost every year. The area of ​​arid and semi-arid areas has increased year by year, and the corn yield has been greatly reduced due to the drought.

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