杂交

• When planning crossing work, it is desirable to be guided by the groupings in such a monograph .
  当计划杂交工作时，最好利用这种专著中的分组作指导。
• Mass produce those combinations between selfed lines that exhibit a great deal of hybrid vigor .
  在自交系之间选杂交优势很大的那些组合进行大量生产。
• It is misspent time to calculate and report hemagglutinating titers for cell hybrid studies .
  在细胞杂交过程中计算和报道血球凝集的滴定度是浪费时间。
• A cross with a bull-dog has affected for many generations the courage and obstinacy of greyhounds .
  把猎犬和斗牛狗杂交可影响许多代猎犬的勇猛和顽固性。
• Ascospore analysis suggested that the fungus is homothallic but will preferentially outcross .
  从分析子囊孢子的结果看出，此菌能同亲配合，但很易异型杂交。
• First a strain with high lysine content is crossed with one having good yield characteristic .
  首先把一个赖氨酸含量高的品系与一个具有丰产特性的品系相杂交。
• Holmes crossed two compatible races of ceratocystis ulmi, the causal agent of dutch elm disease .
  霍姆斯曾把荷兰榆病害的致病因子，长喙壳的两个亲和小种杂交。
• This is because of the relative paucity of hybridization in the fungi as compared with green plants .
  这是因为真菌中的杂交同绿色植物比较起来相对贫乏的原故。
• The kind of mating, using as one parent a known homozygous recessive, is called a testcross .
  这种杂交即利用一个已知的纯合的隐性作为一个亲本的杂交，称为测交。
• All the pomoideae were allopolyploids derived from a doubled hybrid between two remote ancestral types .
  所有的梨亚科是由两个远缘祖先类型双杂交演化的异源多倍体。