Method of breeding high-yield multi-resistance corn single hybrid

Abstract

The invention discloses a method of breeding a high-yield multi-resistance corn single hybrid, which includes: firstly, setting a breeding goal, and breeding a medium- and large-ear corn single hybrid with proper growth period, high yield and stability and high stress resistance according to ecological environmental characteristics of Hunan and southwest, such as hilliness, barrenness and seasonal draught; secondly, breeding parents, wherein the female parent X990 is obtained by means of seven-generation continuous selfing via reproduction in south and breeding in north using Tie7992 as a female parent and Zheng58 as a male parent finial generation, and the male parent W388 is obtained by means of recurrent cross of Dan598 and six-generation continuous back cross and selfing via reproduction in south and breeding in north using Dan598 as the female parent and Dan341 as the male parent finial generation; and thirdly, breeding the single hybrid, using a cross combination of X990 as the female parent and W388 as the male parent after test crossing, and naming as XiangYu98 which is suitable for various places in Hunan and surrounding areas. The high-yield multi-resistance corn single hybrid is of a medium- and large-ear cultivar, leaves above each ear are narrow, light transmission in fields is fine, plants are medium, yield is high, live stems are mature, and kernel commodity is good.

Description

technical field [0001] The invention belongs to the field of hybrid corn breeding, and more specifically relates to a method for breeding a high-yield, multi-resistance single-cross maize, which can be used to breed a high-yield, multi-resistance single-cross maize suitable for planting in Hunan and southwest mountainous areas. The invention is suitable for agricultural scientific research and teaching, seed companies and other departments engaged in corn breeding, seed production research and production. Background technique [0002] Corn is the main food crop in Hunan Province and Southwest China. The ecological environment in this region is complex, the climate types are diverse, the altitude difference is large, the temporal and spatial distribution of rainfall is very uneven, and seasonal droughts are frequent; 85% of corn is planted in dry land without irrigation conditions , belonging to rain-fed agriculture. The main problems in corn production in this area are: slo...

AI Technical Summary

Problems solved by technology

The main problems in corn production in this area are: slow variety replacement, low proportion of high-quality corn single-cross planting area, lack of high-yield, high-quality, suitable for medium and high altitude planting, drought-resistant and disease-resistant hybrid varieties, and the combination of varieties at different altitudes And the layout is unreasonable, the high-yield cultivation technology is not matched, the rate of advanced technology is low, and the yield per unit area is lower than the national average level