论文部分内容阅读
一、大力开展选择育种选择(Selection)是达尔文学说的重要内容,他的自然选择与人工选择理论对生物科学和农牧业品种改良都起了重大作用。通过选择,培育良种,也是林木遗传改良的重要手段之一。包括个体选择与群体选择两个部分。个体选择可望获得纯系良种和明显的遗传增益,因而颇为行家重视,不多赘述。由于树木群体的杂合性,可能影响到
First, to vigorously carry out selection Selection is an important part of Darwin’s theory. His theory of natural selection and artificial selection played a significant role in the improvement of biological sciences and animal husbandry. By selecting and cultivating good seeds, it is also one of the important means of genetic improvement of trees. Including the individual selection and group selection of two parts. Individual selection is expected to be pure lineage and significant genetic gain, which is quite expert attention, not repeat them. Due to the heterozygosity of tree populations, this may be affected