Study of the Inheritance of Several Morphological and Chemical Traits of Several Genotypes of Tobacco (Nicotiana tabacum L.)
Qamar Sufan *
Department of Crops, College of Agricultural Engineering, Tishreen University, Syria.
*Author to whom correspondence should be addressed.
Abstract
The experiment was carried out during the year 2024 to determine the genetic behavior of many different traits of the three parents of the oriental tobacco in kassab village, Lattakia, Syria, by cultivating three oriental tobacco genotypes (Basma, Prilep, and Gob-Hasan). A half-diallel cross was made between different genotypes of tobacco using random complete block design (R.C.B.D) with three replicates, to estimate the nature of gene action for many important characteristics of tobacco plants and identifying the best parents to include in breeding programs to obtain tobacco with high productivity and high quality.
Traits such as leaf length (cm), leaf width (cm), specific leaf weigh (g/cm2), nicotine (%) and sugar content in leaves (%) were measured.
The results show high differ significantly for all traits, which refer to differ among the parents. Thus increasing the effectiveness of the hybridisation programme.
The genetic analysis show the additive gene action dominated the inheritance of: leaf width (cm). But the non-additive gene action dominated the inheritance of leaf length (cm), specific leaf weigh (g/cm2), nicotine (%) and sugar content in leaves.
The Basma parent P1 exhibited a lowest means for: nicotine content in leaves (0.22)%, The Prilep parent P2 exhibited a high means for: leaf length (23.3) cm and specific leaf weigh (0.22) g/cm2. However, The Gob-Hasan parent P3 exhibited a high means for: leaf width (11.7) cm. The hybrid Prilep × Gob-Hasan exhibited the highest means for sugar content in leaves (10.67)%.
Keywords: Half-diallel cross, gene action, oriental tobacco, genetic improvement
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