Genetic Analysis for Agronomic, Chemical , and Leaf Chararters According to Stalk Position in Flue-Cured Tobacco (Nicotiana tabacum L. ) II. Analysis of Gene Action by Diallel Crosses

황색종 연초(Nicotiana tabacum L.)의 주요형질과 엽위별 엽형질에 대한 유전분석 II. 이면교배에 의한 유전자 작용분석

This experiment was conducted to obtain basic information on breeding of flue-cured tabacco varieties . Nine cultivars and partial diallel set of 36 Fl hybrids were grown at Daegu Experiment Station, Korea Ginseng & Tobacco Research Institute in 1983. Partial dominance with high additive gene effect was observed for yield, leaves per plant , days to flower, leaf weight, nicotine and reducing sugar content. partial dominance with additive and dominant gene effect was observed for stalk height , leaf width midrib weight Overdominance with high dominant gene effect was observed for leaf length and midrib width. The directions of dominance were positive for yield, stalk height, leaf weight, leaf length, leaf width, midrib weight, midrib width and reducing sugar content, and the negative was days to flower. The estimates of effective genes were 1 for leaves per plant, 2 for stalk height, days to flower and leaf shape. 3 to 6 for leaf length, leaf width, leaf weight and midrib weight.