烤烟主要农艺性状的遗传分析.pdf

62 Chinese Tobacco Science 2013-10 ，34 （5） * 550025 F1 NC Ⅱ7 12 F1 5 2 ×G28×Florda301 Florda3012 S572.03 1007-5119201305-0062-05 DOI10.3969/j.issn.1007-5119.2013.05.013 Genetic Analysis of the Main Agronomic Traits of Flue-cured Tobacco XU Hang, LIU Renxiang*, XU Ruhong, YUAN Fu, WU Zuxuan (Guizhou University, Key Laboratory of Tobacco Quality Research in Guizhou Province, Guiyang, 550025, China) Abstract: In order to predict the hybrid merits of flue-cured tobacco F quickly and accurately, and promote the breeding of the 1 strong advantages of hybrid combination, we used the NCII mating design approach, with seven flue-cured tobacco varieties (strain) forming 12 cross combinations, to explore the heterosis performance of some major agronomic traits about parents and F , and to 1 analyze their combining ability and heritability. The results showed that heterosis had large discrepancy according to different traits and hybrid combinations. The five traits sort heterosis by size order: plant height leaf area leaf length leaf width number of leaves. The group traits showed a certain negative except plant height. The study of combining ability help to select the relatively ideal hybrid combinations and parents in this research. Meanwhile, the research of parental heritability showed that each trait selection was more reliable, but non-additive heritability had a promi