Improved field trail test for assessment of sugarcane hybridized combinations

Abstract

The invention discloses an improved field trail test for assessment of sugarcane hybridized combinations. Seedlings are cultivated in a seedling cultivation greenhouse in or around middle April everyyear and temporarily planted by a row spacing of 10cm and a line spacing of 20cm in an outdoor seedbed in or around middle July to form seed stems through stem elongation on the seedbed, and then theseed stems are cut during January to March and planted in a field by a line length of 1.5m and a line spacing of 1m, each line allows planting of one clone, 8 buds of each clone are planted, and eachcombination is planted for three times repeatedly; at the end of the year or the beginning of the next year, agronomic characters and disease symptoms required by combination assessment are collected,and advantages and disadvantages of the combinations are assessed through statistic analysis to provide references for hybridized combination preparation and variety breeding. By adoption of the method, objective trail results can be obtained, reliability of assessment results of the hybridized combinations can be improved, and increasing of sugarcane breeding efficiency is further promoted.

Description

technical field [0001] The invention belongs to the technical field of sugarcane hybrid breeding, in particular to a field test method for evaluating sugarcane hybrid combinations. Background technique [0002] Sugar cane is the main sugar crop in my country, and the sucrose production accounts for more than 90% of the total sugar in my country. Hybrid breeding is currently the main way to cultivate new varieties of sugarcane, widely adopted by countries all over the world. The "five-field system" breeding is a traditional selection procedure adopted by sugarcane hybrid breeding in my country. The five fields are: hybrid field, seed selection field, identification field, reserve comparison field, and variety comparison field. After being screened by the "five garden system" test, the high-quality materials entered the multi-point regional test and production test for many years, and finally registered and promoted their application. [0003] Hybrid combination is the basis...

AI Technical Summary

Problems solved by technology

[0005] Because most of the target traits sought by sugarcane hybrid breeding are quantitative traits, they are not only susceptible to environmental influences, but also under traditional test methods, because each seedling is a clone (genotype), each clone population is very small ( There is only one clump of sugarcane stalks), its performance is not only affected by the environment, but also intensifies the competition effect between clones, which in turn affects the objective evaluation of the performance of the hybrid combination, that is, the evaluation of the genetic effect of the hybrid combination