【摘要】 本文回顾了近几十年来国内外有关林木优良基因型早期评价和选择的方法.系统地阐明了早期测定在整个综合的林木育种模式中的重要性。对各种早期测定研究的材料、方法和结论作了比较和分析,指出种子、苗期和幼龄试验地性状是较好的早期测定性状.并讨论了在多世代选择中早晚相关的可靠性问题.更多还原

【Abstract】 The methods of early evaluation and selection of fine forest genotypes in lastdecades in the world are reviewed, with the theoretical basis of early testing examined.The importance of early testing in a synthetic forest tree breeding model includinglong-term and short-term breeding programs is expounded systematically. The materi-als, methods and general conclusions of various studies are compared and analyzed. Itis thought that selection of proper characters and experimental conditions is crucial toearly testing. Characteristics of seed, seedling and juvenile tree testing plots are goodcharacteristics for early prediction, while some indicators such as photosynthetic rateused as predicative factor are not. The problems frequently arising in many studies aresummarized. It is pointed that henceforward attention should be paid to the age or testmaterials, natural conditions of testing field and the interaction of genotype x environ-ment on the result of early testing. Distinction should be made among results of various testings. The reliability of correlation between early and late generations amongmultigeneration selections is discussed. For the purpose of reducing tcsting fees and in-creasing testing accuracy, a new early testing method---multi-stage selection is pro-posed.更多还原