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植物产量与光合作用的关系是非常密切的,作物产量90—95%的物质来自光合作用,在作物育种中通过改良株型,以提高光能利用率,已选育出许多高产品种;近期又提出高光效育种,开始了以提高叶片光合效率为主要育种指标的育种试验.在用材树木育种中,主要是采用生长量测定和形态性状与生长相关分析的方法,对于树木的光合特性的遗传变异研究还不多,以往有关柳树光合特性的研究仅限于对几种柳树光合强度及呼吸强度的测定与比较.我们在速生用材乔木柳育种中,试图分析各种柳树光合特性的遗传差异,研究光合特性诸性状的遗传相关,了解影响主干生长的主导因子,以便有效地进行生长性状的遗传改良,选育出速生的用材乔木柳无性系.
The relationship between plant yield and photosynthesis is very close. Crops yield 90-95% of the material from photosynthesis, in crop breeding by improving plant type, in order to improve the utilization of light energy, has been bred a lot of high-yield varieties; recent We proposed the breeding of high light efficiency and started the breeding experiment to improve the photosynthetic efficiency of the leaves as the main breeding index.Using the method of growth quantity determination and morphological traits and growth correlation analysis in timber tree breeding, the genetic variation of photosynthetic characteristics The research on the photosynthetic characteristics of willow is only limited to the determination and comparison of the photosynthetic and respiration intensity of some willows.We tried to analyze the genetic differences of the photosynthetic characteristics of the willow species, Characteristics and traits of genetic related to understand the main factors that affect the growth of the trunk in order to effectively carry out genetic improvement of traits, breeding fast growing timber Qiaoming Liu clones.