优势度则随着品种抗性的增强而增强。
The concentration was increased when the resistance of variety was increased.
阐述了甘薯瘟菌系致病类型、品种抗性分类、抗性遗传趋势和病菌潜伏侵染特征；
The pathotypes, classification of cultivar resistance, advancement of resistance genetics and latent infection of bacterial wilt disease of sweet potato were presented.
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。
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.
将抗性基因转入葡萄品种是培育无核葡萄抗病品种的有效途径。
It is an effective approach to breed the resistance cultivars of seedless grape by transferring resistant gene into the cultivars of Vitis vinifera.
当他测试一个新品种的抗性时，他震惊的发现植物茎杆上的伤疤不是条纹锈病的黄色条纹，而是茎杆锈病的发炎脓包。
Whiletesting a new variety’s resistance, he was alarmed to find stems scarred not bythe yellow streaks of stripe rust but the angry pustules of stem rust.
到目前为止，研究者已经开发了大约60种含有多种低抗性基因的实验型小麦品种。
So far, researchers havedeveloped about 60 experimental wheat varieties with multiple low-resistancegenes.
就谷物和产草量而言，新品种性能相当于或优于其母本品系，而且对霜霉病的抗性显著增强。
These have performed as well as or better than their parent lines in terms of grain and straw yield, and possess a markedly improved resistance to downy mildew.
棉花对枯萎病的抗性遗传是由多基因控制，当一个品种处于一种复杂的群体状态时，这些抗病基因可能分别存在于不同个体上。
The resistant heredity of the fusarium wilt is controlled by many genes, when a variety is in a complicated colony , these disease-resistant genes may exist in different individuals separately .
到目前为止，研究者已经开发了大约60种含有多种低抗性基因的实验型小麦品种。
So far, researchers have developed about 60 experimental wheat varieties with multiple low-resistance genes.
这种新品种的草莓对许多疾病都有抵抗性。
不同百合品种对病毒病的抗性有差异。
Different lily species has different resistance to viral disease.
在抗性和敏感品种中，血淋巴和中肠组织中的总碳水化合物的量略有下降。
There was a slight decrease in total carbohydrate content in haemolymph and mid gut tissue in susceptible and resistant breeds.
两年来，通过田间小区试验，对青海省当前生产上已有的72个小麦品种(系)进行了赤霉病抗性鉴定。
The disease resistance of 72 varieties (or lines) of wheat to wheat scab in Qinghai existing agricultural production has been identified by field plot experiment at present for two years.
试验统计表明：330等6个甘薯品种间对甘薯瘟病的抗性差异显著或极显著。
Statistics for the test data showed the resistance differences between the 6 varieties including 330 were remarkable or extremely remarkable.
是我国及世界稻区主要害虫，培育抗性品种是最经济有效的防治手段。
Breeding resistance varieties is the most economic and effective way to control the pest.
研究结果表明，谷子品种资源对粒黑穗病的抗性存在着明显的差异。
The study showed that resistance of foxtail millet varieties to grain smut were different.
当地菌源的存在和小麦品种的抗性丧失是发生大流行的内因，春季降水量多是大流行的决定性因素。
The prevalent internal cause was existence of the local bacterial source and loss of the resistant ability of wheat varieties, while the decisive factor was the abundant rainfall in spring.
由此说明离体筛选的水稻抗纹枯病突变体的抗病机制与一般抗性品种类似。
These results suggested that in vitro screened rice somatic mutants resistant to sheath blight had the similar resistant mechanism as general resistant varieties.
同时对12个具有不同抗性水平的水稻品种苗期的抗性表现进行了遗传型稳定性分析。
Stability of resistance of 12 rice varieties with different resistant levels in seedling stage was studied.
品种衰退的主要原因是抗性的丧失；
The main cause of variety decline was due to the loss of its resistance.
以污染区牡丹叶尖枯病的病情指数为依据，测定了128个牡丹品种对大气氟污染的抗性。
The resistance of 128 peony varieties to air fluoride pollution has been determined according to the disease index of peony leaf tip blight in the region of air fluoride pollution.
不同的大豆品种对线虫有抗性差异。
Different soybean varieties presented different disease resistance.
品种国眉占的抗性受一对隐性基因控制；
The resistance of ' Guomeizhan' was controlled by one recessive gene'.
在生物学研究中，品种的抗性与其膜脂流动性之间的内在关系一直是生物学研究中的重要内容。
The internal relations between resistance and membrane lipid fluidity of various breeds have long been the important content in the study of biology.
这些QTL被认为与水稻品种对白背飞虱田间抗性表达有关。
These QTLs were considered to be associated with the expression of field resistance of rice varieties to WBPH.
植物中抗病基因所决定的抗病性是一种高水平的品种对病原菌小种的专化抗性。
Plants disease resistance controlled by the resistance gene (r gene) is a resistance with high specificity at the cultivar to race level.
显然敏感品种的呼吸主要通过糖酵解途径，而抗性品种比较依赖戊糖磷酸途径。
Sensitive varieties apprently respire mainly by the glycolysis pathway whereas resistant varieties depend more on the pentose phosphate pathway.
培育具有水平抗性的品种是目前抗病育种的重点。
To breed cultivars with horizontal resistance is stressed in late blight resistance breeding.
培育具有水平抗性的品种是目前抗病育种的重点。
To breed cultivars with horizontal resistance is stressed in late blight resistance breeding.
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