Tobacco disease was a limit condition in tobacco production. The research of tobacco resistance and resistant breeding was efficient approach to solve the problem.
烟草病害是制约烟草生产的难题，研究烟草的抗病性和选育抗病品种是解决这一难题的有效途径。
The MHC genes are highly polymorphic and the research hot point in the origin and evolution of species and the disease resistant breeding.
MHC中的基因具有丰富的多态性，是物种起源、进化和动物抗病育种的研究重点之一。
Hybridization selection may expand the source of cotton germplasm, it is very important to improve the disease-resistant and high-quality breeding.
杂交选育可以扩大种质的来源，这对提高品种的抗病性和优质育种很重要。
It is widely accepted that breeding, selection and cultivation of the disease resistant varieties are the most economic and efficient disease control practice.
长期的实践表明，选育、种植抗稻瘟病品种是最经济有效的防病措施。
Breeding resistant cultivars using resistant resources is an economic and effective approach to control this disease. Resistance breeding is one of the important goals in the apple breeding program.
培育抗病品种是苹果育种的重要目标之一，利用分子标记辅助育种技术，对加快优良抗病品种选育具有重要意义。
The rice bacterial blight (BB) is one of the most serious diseases in China. Breeding resistant varieties has proved to be the most effective and economical means to control the disease.
水稻白叶枯病是危害我国水稻生产的严重病害，培育抗病性品种是最有效的防治办法。
However, the resistance of cultivars is easily loss due to the high genetic variability of isolates. Mining durable resistance genes has become a key problem in disease resistant breeding.
然而，由于大豆疫霉菌小种的高度变异性导致品种抗性极易丧失，挖掘持久性抗病基因已成为抗病育种的难题。
It has been proved that breeding and planting disease-resistant cultivars is the most economical and efficient means to control this disease.
实践证明，选育和种植抗病品种是控制该病害最经济有效的措施。
It has been proved that breeding and planting disease-resistant cultivars is the most economical and efficient means to control this disease.
实践证明，选育和种植抗病品种是控制该病害最经济有效的措施。
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