Breeding method of entire silo corn hybrids

Abstract

The invention provides a breeding method of entire silo corn hybrids. The breeding method comprises the steps of breeding a parent selfing line, isolating spatially, artificially hybridizing, bagging for isolation and selfing for achieving homozygosity; performing test mating on a selfing line A and a selfing line B to obtain a single cross hybrid F1; and finally, carrying out test mating on the single cross hybrid F1 used as a female parent and a third selfing line C used as a male parent to breed the entire silo corn hybrid (three-way cross hybrid). The breeding method adopts three selfing lines to breed the entire silo corn hybrid and opens up a new method for breeding of the silo corn hybrid; the bred three-way cross hybrid has the characteristics of high quality, high biological yield and high seed production, contains more than 10% of crude protein, lower than 45% of neutral detergent fibers and lower than 25% of acid detergent fibers; two selfing lines are subjected to test mating to obtain the single cross hybrid, then the single cross hybrid used as the female parent and another one selfing line used as the male parent are used for seed production, and therefore, the seed production yield is ensured and the seed production cost can be reduced.

Description

Technical field: [0001] The invention relates to a seed production technology of corn hybrids, in particular to a method for breeding whole plant silage hybrid corns. Background technique: [0002] Corn is an important feed crop and food crop. Because of its high feed value, it is known as the "king of feed". Silage corn refers to a kind of corn specially used to raise poultry and livestock, and its ears, stems and leaves can be used as feed. Developed animal husbandry in the world, such as France, Canada, etc., have cultivated a large amount of special corn for silage for whole plant silage. According to Anon statistics, the area of ​​silage corn planted in Europe reaches 3.3 million hectares 2 . The total value of silage corn produced in the United States is approximately $1.5 billion annually. Silage corn has a high yield and is rich in nutrition. It is the most important feed source for the production of livestock products such as milk and meat in the world. Almost a...

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Problems solved by technology

At present, Mexican corn is mainly promoted in the south of my country, and there are introductions in North China. However, because Mexican corn requires high temperature and high humidity, it is difficult to meet the climatic conditions in North China, and the cultivation effect is not ideal. The "Yanmenguan Animal Husbandry Economic Zone Construction" project in our province was launched. However, due to the shortage of silage and green mow varieties, Yayu No. 8 seed corn and Aventurine white and other comprehensive varieties can only be used as silage corn varieties. The lack of silage corn varieties has become a limitation to the rapid development of animal husbandry. the bottleneck

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