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绪论一般认为,F_2混合群体产量测验或较高代后裔的产量测验是自花授粉作物组合间选择的一种有用手段.Rosielle(1983)发现,混合群体产量测验一般能对范围广泛的一系列总体参数提供高而正向的遗传获得量.混合群体测验与F_2-后裔法相似(Lupton等,1957)之处在于,譬如在F_4和F_5测验F_2派生系统,然后在其最高产的F_2派生系统内选择F_6植株.这些F_6植株应在大多数位点上是纯合的并可用来产生F_6派生株系,经过产量比较试验,最后可能作为品种进行推广.
Introduction It is generally accepted that the F 2 mixed population yield test or the higher progeny progeny yield test is a useful tool for self-pollinating crop combinations. Rosielle (1983) found that mixed population yield tests generally give a broad range of The parameters provide high and positive genetic gain.The mixed population test is similar to the F_2-descendent method (Lupton et al., 1957) in that the F_4 and F_5 quiz F_2 derive the system and then in its most productive F_2 derivation system F_6 plants were selected.The F_6 plants should be homozygous at most loci and can be used to generate F_6-derived strains that, after yield comparison tests, may eventually be promoted as varieties.