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一、前言 杉木配合力育种的研究是从1974年开始的。其目的是:通过子代测定,研究待测亲本的一般配合力(g.c.a)和特殊配合力(s.c.a)的表现,以便对现有种子园进行选优去劣,并为建立多世代种子园提供理论依据;同时,通过对杉木配合力的研究,了解杉木性状受遗传控制的强弱,并估算其有关遗传参数,从而更有效地制定杉木遗传改良程序。本文仅就1974和1975两年的试验结果进行分析和讨论。 二、材料和方法 (一)交配设计 1974年应用析因测定方法,从待测无性系中任意选出4个作测交父本,分别与8个无性系母本进行交配。由于杂交和育苗上的原因,目前有效杂交组合仅有23个(图1)。 1975年,除进行析因设计之外,还应用了全双列和半双列杂交设计。析因设计包括三个测交系父本,分别与36个待测母本交配,现在观测数据完整的有91个组合(图2);半双列
First, the preface Cunninghamia lanceolata breeding research began from 1974. The aim is to study the performance of the tested gca and sca in progeny through progeny assays in order to optimize the existing seed orchards and to provide multi-generation seed orchards Theoretical basis; At the same time, through the research on the combining ability of Chinese fir, we know the genetic control of Chinese fir traits, and estimate the related genetic parameters so as to make the Chinese fir genetic improvement program more effective. This article only on 1974 and 1975 two years of test results for analysis and discussion. II. Materials and Methods (I) Mating Design In 1974, the method of factorial determination was used to select 4 randomly selected test clones from tested clones for mating with 8 clones. Due to the hybridization and nursery reasons, there are only 23 effective cross combinations (Figure 1). In 1975, in addition to factorial design, full-duplex and half-duplex hybrid designs were also applied. The factorial design consists of three paired male lines paired with 36 males tested, now with 91 combinations of complete observations (Figure 2); half-double