Crossbreeding method of phosphorus-efficient corn

Abstract

The invention belongs to the technical field of crossbreeding, and discloses a crossbreeding method of phosphorus-efficient corn, which comprises the following steps: hybridizing a corn male parent and a corn first female parent to obtain hybrid combination F1-generation seeds; in the corn growth period, corn plants are treated for three times, and planting conditions are screened; under the planting condition obtained through screening, selfing the hybrid combination F1-generation seeds, screening specific plants with screening characters from selfed progenies, and selfing to obtain a second corn female parent; hybridizing the second female parent of the corn with a male parent of the corn to obtain new F1-generation seeds; the obtained new F1-generation seeds are pretreated, and the phosphorus-efficient corn seeds are obtained. According to the method, the second female parent of the corn is screened under the low-phosphorus and drought conditions, the obtained second female parent and hybrid seeds of the corn are high in phosphorus absorption effect and resistant to drought, and the prepared corn seeds are high in yield and high in resistance to severe environments and have the excellent characteristics of insect resistance, grass resistance, disease resistance, drought resistance and saline-alkaline tolerance.

Description

technical field [0001] The invention belongs to the technical field of hybrid breeding, and in particular relates to a method for hybrid breeding of phosphorus-efficient corn. Background technique [0002] At present, maize has a large planting area in China and is widely distributed. It is one of the main grains for people in northern and southwestern mountainous areas and other dry valley areas of China. The bumper harvest of corn is a major issue related to food security and social stability. In recent years, due to weather conditions such as drought and the inability to irrigate the corn in time, the yield of corn has been greatly reduced. At the same time, due to the bullish price of phosphate fertilizer in recent years, many farmers apply less or no phosphate fertilizer in corn planting, which also reduces the drought tolerance and yield of corn. Therefore, cultivating high-yielding phosphorus-efficient and drought-tolerant maize varieties is one of the important way...

AI Technical Summary

Problems solved by technology

[0003] Through the above analysis, the existing problems and defects of the prior art are as follows: due to the rising price of phosphate fertilizer in recent years, many farmers apply less or no phosphate fertilizer in corn planting, which also causes the drought tolerance and yield reduction of corn

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