现代遗传育种技术在农林复合系统中的应用

Application of Modern Genetic Breeding Technology in Agroforestry System

分子标记、辐射育种、基因工程等现代育种技术及其发展将对农林复合系统发挥重要作用。文中分析农林复合系统种间关系中存在的诸如林木品种选育周期长,冠幅影响林下作物光合效应,与林下作物争夺资源导致林下生物量减少等问题,从遗传育种对农林复合系统中林木的作用,生物技术限制林木高生长和冠幅长势,选育优质高产林下作物等方面阐述遗传育种技术在农林复合系统中的应用,认为现代生物技术的发展对农林复合系统的种间结构配置合理、种间关系和谐、实现高产有重要作用。

The modern breeding techniques such as molecular marker,radiation breeding and genetic engineering play an important role in agroforestry system.This paper analyzed the problems existing in the interspecific relationship of agroforestry system,such as the long breeding cycle of forest varieties,the influence of canopy width on the photosynthetic effect of understory crops,the decrease of understory biomass caused by competing for resources.According to studying the application of genetic breeding technology in agroforestry system from the role of genetic breeding on trees,the limitation of biological technology on tree height and canopy growth,and the breeding of high-quality and high-yield understory crops,this paper considered that the development of modern biotechnology played an important role in reasonable interspecific structure,harmonious interspecific relationship and high yield of agroforestry system.