Selective breeding method of high-resistance tobacco variety

Abstract

The invention discloses a selective breeding method of a high-resistance tobacco variety and belongs to the technical field of resistive breeding of tobacco. According to the selective breeding method, the tobacco high-yield varieties Yunyan 85, Yunyan 87 and Zhongyan 100 or K326 are taken as recurrent parents, and the cold-resistant variety Honghua Dajinyuan, the drought-resistant variety Zhongyan 14, the brown spot and blackleg resistant variety Zhongyan 86, the root-knot nematode-resistant variety TI1706, the common mosaic virus-resistant variety Taiyan No.7 and the tobacco bacterial wilt-resistant variety D101 as resistant resource parents, and the seven major drought, cold and disease resistant resource genes of the tobacco are pyramided and inserted into the good-quality high-yield tobacco variety with the same genetic background by use of a synchronous backcross and convergent cross method, so that a new high-resistance, high-yield and good-quality tobacco variety, which is highly resistant to 7 drought, cold and disease damage factors and highly consistent with the original recurrent parents in other agricultural and yield traits, is obtained.

Description

technical field [0001] The invention specifically relates to a method for breeding high-resistant tobacco varieties, and belongs to the technical field of tobacco resistance breeding. Background technique [0002] Since my country implemented the tobacco monopoly system in 1982, the tobacco industry has made great progress and has become an important pillar industry in the national economy. The "China Tobacco Products Industry Production and Marketing Demand and Investment Forecast Analysis Report" shows that by 2010, the market sales revenue of the tobacco industry reached 519.793 billion yuan, and tobacco planting provided considerable economic income for tobacco farmers. During the planting process of tobacco, it is often affected by climatic conditions such as drought and cold damage, as well as various diseases. Extreme climate and diseases can cause tobacco planting to reduce production by 10-30%. If no control is carried out, it can cause 30% %-50% loss, spraying pes...

AI Technical Summary

Problems solved by technology

During the planting process of tobacco, it is often affected by climatic conditions such as drought and cold damage, as well as various diseases. Extreme climate and diseases can cause tobacco planting to reduce production by 10-30%. If no control is carried out, it can cause 30% %-50% loss, spraying pesticides can control the damage of tobacco diseases to a certain extent, but long-term large-scale use of pesticides will destroy the natural ecology, pollute the environment, cause the disease to rampant again, and increase the difficulty of prevention and control