Silage corn female parent breeding method

Abstract

The invention discloses a silage corn female parent breeding method, and belongs to the technical field of corn breeding. The silage corn female parent breeding method comprises the steps of taking corn varieties or population from a temperature zone as a base material, and introducing the varieties or population into a tropical and subtropical zone for planting; enabling S1-S9 generations to be planted in the tropical and subtropical zone, carrying out identification screening, and selecting the plants in the male and female flowering and with high disease resistance, high lodging resistanceand excellent grain quality for selfing; and enabling the S10 generation to be planted in the east of North China silage corn main production area, performing identification, taking the mainly popularized grain corn variety as a parent for contrast, and selecting a selfing line as the silage corn female parent, wherein the growth period of the selected selfing line is basically consistent to the parent growth period of the mainly popularized grain corn variety, the leaves are thick and green, the stalks are thick and tough, the plants are relatively high and tall, and the lodging resistance ishigh. The method can be used for cultivating the silage corn varieties with high biological yield, high stay-green property and excellent quality.

Description

[0001] field of invention [0002] The invention relates to a breeding method for female parents of silage corn, belonging to the technical field of corn breeding. Background technique [0003] Silage corn refers to harvesting the green plants on the ground including fruit ears during the suitable harvest period (the position of the milk line of the grain is about 1 / 2), and after being chopped and processed, silage is made by silage fermentation to feed cattle and sheep A kind of corn mainly for herbivorous livestock. Compared with ordinary grain corn, silage corn has the characteristics of high biological yield, good greenness, and high quality. [0004] In recent years, with the rapid development of animal husbandry, the implementation of the national grain-to-feeding policy and the adjustment of the planting structure in the Sickle Bay area, the demand for silage corn has continued to rise, and the planting area of ​​silage corn has expanded year by year. However, the exi...

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Problems solved by technology

However, the existing silage corn varieties are difficult to meet the production needs of the silage corn industry. reaction, will show various maladaptations, such as tasseling, loose powder, late silking, prolonged growth period, uncoordinated sex and poor firmness, etc.; silage corn varieties with heavy ancestry in temperate zones have poor greenness, low biomass, and poor grain quality. Therefore, it is of great significance for improving the biological yield and quality of silage corn in my country to breed corn parents that can be adapted to the planting of the main silage corn producing area (Northern East my country) in China and to be used in the breeding of silage corn varieties

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