Breeding method for multi-resistance hibiscus cannabinus variety

Abstract

The invention discloses a breeding method for a multi-resistance hibiscus cannabinus variety, belonging to the technical field of hibiscus cannabinus disease resistance breeding. The breeding method comprises the steps that a high-yield hibiscus cannabinus variety is taken as a recurrent parent, the recurrent parent is respectively hybridized with an anthracnose resistant source parent, a root knot nematode disease resistant source parent and a gray mould resistant source parent, firstly the three main hibiscus cannabinus disease genes are respectively imported into one high-yield hibiscus cannabinus variety by adopting a hybridization back-crossing method, then the three main hibiscus cannabinus disease genes are polymerized together by adopting a hybridization re-crossing method, and finally a hibiscus cannabinus variety which is resistant to three diseases at the same time is bred. The multi-resistance hibiscus cannabinus variety bred by adopting the breeding method is good in resistance and high in yield, application amount of a pesticide can be obviously reduced, and the yield is increased while environmental pollution can also be reduced. By adopting the breeding method disclosed by the invention, the three main hibiscus cannabinus disease genes resistant to anthracnose, root knot nematode disease and gray mould can be polymerized together, the hibiscus cannabinus variety which is resistant to the three diseases at the same time can be bred, and cost for pesticide application and labour each mu is reduced, investment of farmers is reduced, income of the farmers is increased, and environmental pollution is reduced.

Description

technical field [0001] The invention specifically relates to a breeding method for multi-resistant kenaf varieties, and belongs to the technical field of kenaf disease-resistant breeding. Background technique [0002] Kenaf is an annual herbaceous bast fiber crop of the Malvaceae Hibiscus genus, and is mostly planted in China, Thailand, India, and Bangladesh. Introduced in China in 1928. my country's kenaf planting area and total output rank first in the world, and it is planted in Anhui, Henan, Guangdong, Guangxi, Fujian, Zhejiang, Shandong, Shanxi, Jiangsu, Hunan, Hubei, Jiangxi, Sichuan and other provinces. Kenaf is mainly used for weaving and papermaking. The fiber of kenaf is silvery-white, shiny, and absorbs moisture quickly. It is suitable for weaving sacks, sacks, carpets and ropes. For livestock feed. The main diseases of kenaf are anthracnose, root-knot nematode, gray mold and so on. Kenaf anthracnose is one of the most serious diseases in my country's kenaf pr...

AI Technical Summary

Problems solved by technology

At present, in order to prevent and control kenaf diseases in production, most of the methods of pesticide control are used, which not only increases the investment of farmers, but also causes serious environmental pollution. The most effective, economical and environmentally friendly way to prevent and control kenaf diseases is to breed disease-resistant kenaf. However, most of the disease-resistant varieties of kenaf at home and abroad are monoclonal resistant varieties, which are only resistant to a certain disease. There is a lack of varieties that can resist multiple diseases at the same time, and the losses caused by diseases in production are very large.