Method for accelerating breeding process of crops by off-site summer planting generation adding

Abstract

The invention discloses a method for accelerating a breeding process of crops by off-site summer planting generation adding. The method for accelerating breeding process of crops by off-site summer planting generation adding comprises the following steps: (1) planting male parents and female parents to harvest F1-generation hybrid seeds; (2) planting the F1-generation hybrid seeds to obtain F2-generation seeds; (3) planting F2-generation seeds to harvest F3-generation seeds; (4) planting F3-generation seeds to harvest F4-generation seeds; and (5) planting the F4-generation seeds to harvest F5-generation seeds. Step (1) to step (5) are finished within 20 months; step (1) to step (3) are finished within 12 months; and step (4) to step (5) are finished within 8 months. The latitude of a territory B is lower than that of a breeding target region by 5 latitudes or above. By the method for accelerating breeding process of crops by off-site summer planting generation adding, four-generation planting in a year is realized, a generation progress of selfing homozygosis is greatly accelerated, and thus, a breeding progress is accelerated.

Description

technical field [0001] The invention belongs to the field of breeding, and in particular relates to a method for speeding up the process of crop breeding by adopting off-site summer multiplication and adding generations. Background technique [0002] Conventional crossbreeding is the most widely used and effective means of crop breeding. Its basic procedure is to use methods such as interbreeding to create variation, to achieve gene homozygosity through continuous selfing, and to select homozygotes that meet the needs, so as to breed new varieties. method. In the process of cross-breeding, after crossing the parents to produce the F1 generation, it is necessary to self-purify for 4 to 5 generations before selecting important traits such as yield, until a stable genetic line is selected, and then carry out line identification and variety tests to obtain Varieties of specificity, consistency, stability and economic utility. It usually takes more than ten years to select and ...

AI Technical Summary

Problems solved by technology

[0003] Most autumn harvest crops such as soybean, rice, and corn are short-day temperature-loving plants, and their development speed can be accelerated by artificial short-day and high-temperature treatment. However, due to the high cost of artificially adjusting light and temperature, the planting scale of breeding materials is limited. Artificial light and temperature treatments are not widely used in breeding of these crops