杂交

• Many thousands of hybrid combinations must be tested for each new hybrid variety released to the public .
  在每个新的杂交种向群众推广以前，要对成千的杂交组合做试验。
• Farmers in the machine age also use the new fertilizers, new sprays, new feeds, new bybrid seeds .
  机器时代的农场主还采用新的化肥、新的喷药、新的饲料、新的杂交良种。
• I have taken some pains to ascertain the degree of fertility of some of the complex crosses of rhodoendrons .
  我曾费相当力量，来探究杜娟花属的若干复杂杂交的能育性的程度。
• The possibilities of producing something entirely new by emulating nature's very wide crosses are enticing .
  用自然界的非常广泛的杂交方法创造出全新植物种的可能性是诱人的。
• Further refinements of pollen management include controlled crosses where the pedigree of the cross is required .
  更细致的花粉管理工作，包括控制杂交，即必要杂交的系谱杂交。
• That cell hybridization can be used to dissect regulatory mechanisms controlling gene expression in eukaryotic cells .
  杂交细胞能被应用于剖析真核细胞中控制基因表现的调节机理。
• He defines the local population or deme as the group of potentially interbreeding individuals at a given locality .
  他说地区的种群或居群是某一地区具有潜在杂交能力的个体的集群。
• The hybridization of various domestic varieties has always been an important technique in plant and animal improvement .
  各种不同驯化品种的杂交在动植物改良中经常是一个重要的技术。
• It is probably safe to assume that almost any scotch pine could be crossed with almost any other scotch pine .
  可以有把握地这样设想，几乎任何的苏格兰赤松都能和其他任何的苏格兰赤松杂交。
• With plants we have conclusive evidence that the sterility of crossed species must be due to some principle .
  在植物方面，我们已有确实的证据，表明杂交物种的不育性一定是由于某种原理而起。