而抗病品种选育的最大挑战在于抗病基因的正确选择。
However, major challenge to rice breeders is to make the appropriate selection of resistance (r) genes.
这一方面降低了田间抗性鉴定的效率和准确性，另一方面阻碍了抗病品种选育的进程。
This reduces the efficiency of screening for resistance in field and slows down the development of new resistant cultivars.
介绍了加强苗木检疫，抗病品种选育，生物防治，药剂防治等方面防治技术研究进展。
The research progress on the control techniques of sapling quarantine, using resistant varieties, biological and chemical control was introduced.
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。
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.
选育抗病品种和种衣剂包衣是目前防治土传病害的主要手段。
So far resistant cultivar and seed coating agent has long been considered as major way to overcome the diseases.
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。
Tobacco disease was a limit condition in tobacco production. The research of tobacco resistance and resistant breeding was efficient approach to solve the problem.
对于甜菜诸多病害的防治，选育抗病品种是最有效的途径。
To protect of these disease, the best way is to selection new variety with traits of good resistance.
本研究目的是筛选大豆疫霉根腐病抗源，为病害防治和抗病品种的选育提供参考。
The objective of this study was to screen effective resistance sources to P. sojae for disease control and resistance breeding.
选育并合理利用抗病品种是防治麦类锈病最为经济而有效的措施之一。
It has been demonstrated that the reasonable use of resistant wheat cultivars is the most effective and economical method to control wheat rust diseases.
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防治措施。
The practice proved that planting blast resistance cultivars is an economical and effective way to control the disease.
甘薯生产上主要采用综合防治方法进行防治，其中选育抗病品种最为经济有效。
The nematodes that limit sweetpotato production are sweetpotato root-knot and rot-knot nematode. The intergrated methods are used to control the disease in sweetpotato production.
甘薯生产上主要采用综合防治方法进行防治，其中选育抗病品种最为经济有效。
The nematodes that limit sweetpotato production are sweetpotato root-knot and rot-knot nematode. The intergrated methods are used to control the disease in sweetpotato production.
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