Potato breeding method

Abstract

The invention relates to the technical field of potato planting, in particular to a potato breeding method. The potato breeding method comprises the following steps of: hybridizing shepody serving asa female parent and a variety with high resistance to potato late blight serving as a male parent to obtain F1-generation seedling seeds; cultivating F1-generation hybrid seedling seeds in a screenhouse, harvesting small potatoes from single plants, and screening F2-generation hybrid seeds with regular tuber appearance and red skin; sowing the F2-generation hybrid seeds into a breeding field in the second year, carrying out mature period and agronomic character screening, screening strains with the mature period of 70-110 days as F3-generation seeds in a focused manner; and planting F3 singleplants in multiple lands in southwest mountainous areas with the late blight incidence of 70% or above, carrying out selection according to the late blight incidence being lower than 15%, and screening the single plants which are good in tuberization property, high in yield, excellent in quality, short in mature period and excellent in comprehensive character as F4-generation. According to the potato breeding method, a new variety of potatoes which meet the commodity of potato chip processing and have the characteristic of resisting late blight can be bred, and the potatoes can be planted in the southwest mountainous areas.

Description

technical field [0001] The invention relates to the technical field of potato planting, in particular to a potato breeding method. Background technique [0002] Potato belongs to Angiosperm, Dicotyledoneae, Solanaceae, Solanaceae, and Solanum annual herb in botanical classification. Also known as potatoes, yams, yam eggs, etc. Tubers are edible and are important crops for food, vegetables, feed and industrial raw materials. my country's potato planting area and total output rank first in the world, and it has an important strategic position in food security. The existing processing varieties of potato chips are mainly Xiabodi, which has good commerciality, but the disadvantage of Xiabodi is that it is susceptible to late blight, so it is planted in the southwest mountainous area, and the effect of chemical control is not ideal. Improve potato cultivation techniques to prevent and control late blight, mainly through adjustment of sowing date, fine management or rotation wi...

AI Technical Summary

Problems solved by technology

The existing processing varieties of potato chips are mainly Xiabodi, which has good commerciality, but the disadvantage of Xiabodi is that it is susceptible to late blight, so it is planted in the southwest mountainous area, and the effect of chemical control is very unsatisfactory.

Cultivation techniques can only slow down the occurrence and prevalence of the disease, but cannot fundamentally prevent and control potato late blight

To prevent and control late blight with chemical agents, cross-spraying with various chemical agents can effectively prevent and control the outbreak of late blight before potatoes show symptoms. However, chemical control brings pesticide residues and environmental pollution, which seriously threatens food. Safety and destruction of the ecological environment are not a sustainable development strategy

However, the tuber quality of varieties with high resistance to late blight is not suitable for processing requirements