The characteristics of stable carbon isotope and water use efficiency for Populus tomentosa hybrid clones
毛白杨杂种无性系稳定碳同位素值的特征及其水分利用效率
The resistance of five hybrid clones of Populus tomentosa to Dothiorella gregariaSacc,with the methods of pathology and physiology is discussed.
该文就毛白杨杂种无性系中的５个系号对ＤｏｔｈｉｏｒｅｌｌａｇｒｅｇａｒｉａＳａｃｃ，的抗病性及其抗性差异进行了探讨，实验采用室内与田间人工接种，自然发病调查与生理指标及愈伤组织测定相结合的方法，结果表明，对照易县毛白杨雌株的抗病性优于毛白杨杂种无性系，而无性系９６，８０，６６的抗病性优于无性系９２，７３。
The oxygen evolution, thermal dissipation, and photochemical energy storage of three hybrid poplar clones, namely the triploid clone B342, the diploid clone B11 [(Populus alba×P.
以光声光谱技术对经不同光强预处理的 3个杂种杨无性系即三倍体无性系B34 2、二倍体无性系B1 1[(Populusalba×P 。
Using the hybrid clones of white poplar as materials,the dynamics of relative conductance rate of the leaves, and the dynamics of relative conductance rate and the extreme value of conductance of the clones under drought stress were determined.
以白杨杂种无性系为材料，测定了离体叶片相对电导率及干旱胁迫下叶片相对电导率和电导率极值的动态变化，并对无性系的耐旱能力进行了比较鉴定。
Variation of Seedling Important Traits of Poplar Distant Hybrid Clones
杨树远缘杂种无性系重要性状变异研究
Genetic Variation Among the Hybrid Clones of P.tremula ×P.tremuloides in Several Physiological Characteristics under Low Temperature Stress;
欧美山杨杂种无性系低温胁迫下几种生理指标的遗传变异
Genetic Diversity of Aspen Hybrid Clones by Using Simple Sequence Repeat DNA Marker;
利用SSR分子标记研究山杨杂种无性系的遗传多样性
Photosynthetic characteristics of hybrid clones of Populus deltoides and P. ussuriensis
美洲黑杨与大青杨杂种无性系苗期光合特性研究
The characteristics of stable carbon isotope and water use efficiency for Populus tomentosa hybrid clones
毛白杨杂种无性系稳定碳同位素值的特征及其水分利用效率
The Somaclone Establishment of Aegilops tauschii×Hordeum vuglare Hybrids , the Production and Cytogenetical Studies of its Amphidiploid and;
节节麦×大麦杂种无性系的建立、双二倍体的创制及其后代的细胞遗传学研究
Crossing Experimentation of Several Catalpa and Variation of Clones
几种梓属植物杂交试验和无性系变异研究
Genetic Analysis of Genplasmatic Resources of Chinese Fir and ISSR Fingerprint Idetification of Clone and Hybrid Breeds;
杉木种质资源遗传分析及无性系、杂交种ISSR指纹鉴定
C value paradox
C值悖理[物种的C值和它的进化复杂性之间无严格对应关系]
Cytological and AFLP Analysis of High Paired Mutants of the Somaclonal Variation in Wheat-rye Hybrid;
小麦—黑麦杂种体细胞无性系高配对突变体的细胞学和AFLP分析
The Combining Ability Analysis and Selection of the Combination between Old Aged Germplasm and Recent Selected Superior Clones of Cunninghamia lanceolata
杉木古树种质与现代优良无性系杂交配合力分析与选择
The Order and Disorder of Complex Systematic Evolution Process;
复杂系统演化过程的有序性和无序性
The Study on Photosynthetic Character of Different Hybrid Tulip Tree Clones
杂交鹅掌揪无性系苗期光合特性研究
Comparison of drought resistance of six hybrid tulip clones
6个杂交鹅掌楸无性系的抗旱性比较
(1) That originally man lived in a state of sexual promiscuity, to describe which Bachofen uses the mistaken term "hetaerism";
（1）最初人们实行着毫无限制的性关系，他把这种性关系用了一个不恰当的名词“杂婚”来表示；
Those sets of chromosomes come from the varieties originally crossbred to create the clone.
这两种葡萄来源于皮诺瓦品种的杂交无性后代。
Tissue Culture and Cloning of Hybride Seeds of Eucommia ulmoides
杜仲杂交子代的组织培养及无性系化
Establishment of Callus System of Populus Tremula ×P.tremuloides and Analysis of the Somaclonal Variation;
欧美山杨杂种愈伤组织再生系统的建立及体细胞无性系变异的分析