Method for increasing yield of mass crossing seeds of sweet potatoes

Abstract

The invention discloses a method for increasing the yield of mass crossing seeds of sweet potatoes. The method comprises the following steps: (1) selection of a seed production base; (2) selection ofseed production parents; (3) transplanting and management after planting; (4) roguing and diseased branch removing; (5) topping and grafting; (6) harvesting of seeds; (7) drying and storage of the seeds. The method disclosed by the invention has the following beneficial effects that: 1, an isolation zone is arranged, so that the possibility of crossing of other non-target parents is avoided, and the seed production quality is increased; 2, just one kind of sweet potatoes are planted, so that the probability that generations pass through identification is increased; 3, the spreading risk of plant diseases and insect pests of the sweet potatoes is reduced to the maximum through isolated seed testing and epidemic situation detection, and the spreading of the plant diseases and insect pests ofthe sweet potatoes is effectively avoided; 4,by removing main stems, more side stems are obtained, the blossom quantity is increased, and the fruiting rate is ensured; 5, honey plants are planted atthe periphery and the middle part of a seed production field, so that bees can be favorably attracted to carry out pollination, and the seed production yield can be increased. According to the methodfor increasing the yield of the mass crossing seeds of the sweet potatoes, disclosed by the invention, the foundation is laid for new variety breeding of sweet potatoes.

Description

technical field [0001] The invention belongs to the field of agricultural technology, and in particular relates to a method for improving the yield of hybrid seed production of sweet potato groups. Background technique [0002] Sweet potato is an important food, feed, industrial raw material and energy crop. In recent years, with the increasingly severe global oil supply situation, the development and utilization of biomass energy has become increasingly important. Sweet potato has a high starch yield per unit area and is considered to be an ideal raw material for the production of fuel ethanol. As a new type of energy plant, sweet potato has huge market potential and will play an important role in my country's energy security. The growing demand for sweet potatoes calls for the development of more new varieties. [0003] The breeding methods of new sweet potato varieties are as follows: laissez-faire pollination, directional hybridization, budding and line selection. Fr...

AI Technical Summary

Problems solved by technology

Domestic breeding units need to create a large number of hybrid seeds every year, but sweet potato is a short-day plant. Due to the long sunshine time in northern China, most varieties cannot bloom naturally

To overcome this obstacle, sweet potato breeders usually use a combination of grafting and short-day treatment to promote sweet potato flowering and fruiting, which requires a lot of time and effort