담배(Nicotiana tabacum L.) 葯培養에 依한 半數體 倍加系統의 特性

Agronomic Characters of Dihaploids Derived from in vitro Anther Culture of Nicotiana tabacum L.

The field evaluation were conducted on dihaploid progenies derived from anther culture of F₁ plants of Va115×Vam-Hicks and Vall5×SC72 (Nicotiana tabacum L.). Dihaploids showed reduced vigor and growth when compared with midparent value but had increased number of harvested leaves and total alkaloids, and later the days to flower. The range of dihaploid characters were deviated more than that of their parents. There were two unexpected genotypic correlations, that is, the genotypic correlations between yield and total alkaloids of the dihaploid progenies of two combinations used were not significantly different from zero, and days to flower and total alkaloids of the dihaploid progenies of one combination was correlated positively.