Research advances in genetics and breeding of Populus davidiana Dode in China

IntroductionBreedingofChineseaspen(Populusd8vjdtanaDode)inChinastartedin195O'swhenthefirstcrossingsweremadebyProfessorYiPeizhongin1946attheagriculturecollegeofChinacenter(Yi1955)andXuWeiyingin1954attheChineseforestryresearchinstitute(XuandHuangetal.1956).CrossingwasmadebetweenPOoUPIushOPej8nsiSandPd8vha8na,Pd8VdenaandPsdrionIjDuringtheperiod196o-197o,greatattentionwaspaidtothehybridizationbetWeenPOPulUsgenusorraces(Han1995).Themosteffective,systematicresearchworkbegantodeveIopsin…     

国内杜鹃属植物组培快繁技术的研究进展

本文从外植体选择、外植体的灭菌方式、基本培养基的选择、诱导培养基的选择、生根培养基的选择、生根苗的移栽这几个方面归纳总结了国内有关杜鹃属植物组培快繁应用的研究进展,并提出了目前存在问题与发展利用前景。     

加速我国植物组织培养产业发展的对策

综述了我国组培快繁产业的发展现状,分析了当前我国组培快繁产业化发展存在的主要问题,并提出了相应的解决对策。     

我国核桃种质资源及育种研究进展

本文概述了我国核桃的起源、分布、品种分类、种质资源以及品种选育方面的研究进展     

Research and Conservation of Forest Genetic Resources in China

The present situation of forest tree genetic germplasm resources research and conservation in China is introduced which including the background, decision-making of conservation strategies and principles, the plan of area division and tree species classification, the sample strategy of germplasm conservation, the advances in conservation pattern and related technologies research, the achievements of germplasm conservation and utilization in China, and the problems to be solved. The recent achievements and data related are listed.     

延边地区中国林蛙养殖地类划分与成图技术的研究

中国林蛙是东北林区栖息的重要野生经济动物,是发展林下经济的主要项目。根据延边地区的森林环境和野生中国林蛙资源状况,将该区域适宜林蛙养殖的林地划分为6类,对人工放养量提出了参考数据,并应用电脑技术制作了分布图。     

Variation in seed and seedling traits among natural populations of <Emphasis Type="Italic">Trigonobalanus doichangensis</Emphasis> (A. Camus) Forman (Fagaceae), a rare and endangered plant in southwest China

The extent of genetic variation in seed and seedling traits of Trigonobalanus doichangensis, a rare and endangered tree in southwest China, was evaluated at the population level. Seeds were collected from four natural populations in the south and southwest Yunnan province, China. Significant differences (P < 0.05) between populations were observed in seed length, seed weight and seedling morphological characters. The analyses revealed that none of the seed and seedling traits had significant correlations with the geo-climatic variables of the populations. Among seed and seedling traits, significant correlations (P < 0.05) were discovered among seed length, seed weight and height of 30-day-old seedlings. Significant correlation (r = 1.00, P < 0.01) occurred also between the height and root collar diameter of 4-year-old seedlings. With the exception of seed width and seed germination percentage, 51–96% of total variation in other seed and seedling related traits was attributed to population effect, as determined by the broad sense heritability. In conclusion, these observations on variation in seed and seedling traits should be a reference point, when considering seed collection of this species for ex situ conservation and species restoration.     

中国安息香科植物种质资源及研究进展

安息香科植物主要分布于亚洲东南部和美洲的热带、亚热带地区,中国地处中亚热带,植物区系复杂,种类繁多,是安息香科植物的主要分化中心。安息香科植物全世界共12属（包括陈涛1995年建立的新属长果安息香属Changiostyrax）,约150种,我国11属,50种,9变种。安息香科植物具有重要的药用、经济和观赏价值。但目前关于安息香科植物的观赏价值、园林应用研究甚为匮乏。最后,对其合理化开发利用提出了加大资源保护力度,加强引种驯化及加强综合开发等建议。     

中国龙脑香科植物研究及利用现状

龙脑香科（Dipterocarpaceae）的大部分植物在我国被列为珍稀濒危植物,其中国家Ⅰ级1种、Ⅱ级6种、Ⅲ级3种,具有极高的经济价值,因此加大龙脑香科植物的保护栽培及研究具有重要的理论和应用意义。文中主要对我国龙脑香科植物资源状况及地理分布、生长特性、种群特征、繁育技术、开发利用价值等进行综述,以期为我国龙脑香科植物的进一步研究、开发利用提供借鉴和参考。