Field trial design method for seed selection nursery stage of sugarcane crossbreeding

Abstract

The invention discloses a field trial design method for a seed selection nursery stage of sugarcane crossbreeding, which comprises the steps: one stem is cut from each clone or genotype material selected from a crossbreeding nursery, and the one stem is planted in a seed selection nursery, wherein the seed selection nursery field test is 1.5 m in line length and 1.0 to 1.2 m in line spacing, each selected material is planted in 1 line, and the bud amount is 8 to 10 buds per line; all the selected materials in a combination are planted in order, while the control species are arranged; during planting, each stem is placed into the line, the stem is cut into 3 buds per section with a knife, the sections are evenly planted in the line, while excess sugarcane buds are removed; for a combination of which the number of selected materials reach 60 and more, the selected materials is divided equally, and repeatedly planted, the number of repetition is 2 to 4; for a combination of which the number of elected materials is less than 60, the selected materials are planted in order. According to the invention, the breeding efficiency can be improved, the test cost is reduced, and the method is simple and effective and easy to operate.

Description

technical field [0001] The invention belongs to the technical field of field experiment design method for the selection and breeding of new sugarcane varieties, and is mainly used in the seed selection nursery stage of the five-garden breeding program of sugarcane cross breeding to guide the development of field experiments and to breed excellent new varieties of sugarcane. Background technique [0002] Sugarcane is the main sugar crop in my country, and the output of sucrose accounts for more than 90% of the total sugar. Hybrid breeding is currently the main way to cultivate new varieties of sugarcane, widely adopted by countries all over the world. The "five gardens" selection is the main selection procedure used in sugarcane hybrid breeding in my country. After being screened by the "five gardens" test, the selected materials will enter the regional test and production test, and finally be approved and promoted. [0003] "Seed selection garden" is the second stage in th...

AI Technical Summary

Problems solved by technology

Because most of the target traits for sugarcane breeding are quantitative traits, they are easily affected by the environment. At the same time, in the "hybrid garden" stage, each seedling is a genotype, the population size is small, and there is fierce competition between genotypes. Factors such as management and test sites make the selection very difficult

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