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一、树木抗性育种的经济意义抗性育种是指通过育种措施获得具有抗病虫危害,抗不良环境条件(如低温、霜冻、低湿、干旱和盐碱等)的特性的新类型或品种。本文重点讨论树木的抗病、抗害虫育种。树木和其它农作物一样,在其生长发育过程中由于遗传性的制约,需要特定的环境条件,只有满足树木生长发育的条件时,才得以正常地生长和发育,传宗接代。但在自然条件下,病毒、细菌、真菌等微生物,多作为病原寄生于树木,其危害住是很大的,轻者降低生长量,重者使树木死亡。例如,常见的红松疱锈病、落叶松早期落叶病,阔叶树白粉病、杨树锈病等。英国苏格兰邓格尔公园山坡上的欧洲落叶松因遭
I. Economic Significance of Tree Resistance Breeding Resistance breeding refers to obtaining new types or varieties of breeding traits that have pest resistance, adverse environmental conditions (such as low temperature, frost, low humidity, drought and salinity). This article focuses on tree disease resistance, insect pest breeding. Trees and other crops, due to genetic constraints in the process of its growth and development require specific environmental conditions, only to meet the conditions of tree growth and development, to be able to grow and develop normally, pass on the line. However, in natural conditions, viruses, bacteria, fungi and other microorganisms, mostly as parasitic diseases in the trees, the damage is very large, light to reduce the amount of growth, the more severe cases of death of trees. For example, the common red rust blister rust, early deciduous larch, hardwood powdery mildew, poplar rust and so on. European larches on the slopes of the Dingle Park in Scotland, England