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NATURE OF INHERITANCE AND HETEROSIS ESTIMATED ON SOME MORPHOLOGICAL QUANTITATIVE CHARACTERS THAT INFLUENCE THE TOBACCO YIELD


BELUL GIXHARI, HALIT SULOVARI

Issue:

SCSB, Volume XVIII

Section:

Volume XVIII - Vegetal Biology

Abstract:

An eight-parental half-diallel study of oriental tobacco cultivars was conducted to estimate inheritance effects and heterosis types for some morphological quantitative characters that influence the tobacco yield in a genetically diverse oriental tobacco population.

The trials were carried out in a randomized block design with three replications, in two different environments, during three years.

Plant height, leaf number, leaf length, leaf width, days to flower and yield (kg ha -1) were determined.ANOVA analysis revealed the presence of an important variability in the experimental materials.

Additive genetic variance appeared to be more important in the inheritance of yield, leaf number and days to flower; while non-additive genetic variance appeared to play a greater role in the inheritance of leaf size and plant height.

The nature of inheritance was: partial dominance with direction towards best parent for yield, early parent for days to flower, higher or low parent for leaf number; and: over-dominance, complete dominance and partial dominance with positive and negative direction towards higher or low parent for leaf size and plant height. Average heterosis values were significant for yield, plant height and leaf size, that indicate the presence of non-additive genetic variance.

Average heterosis ranged from 2,8% for yield to 4,7% for middle leaf width.

Keywords:

Nicotiana tabacum L, , heterosis, inheritance, quantitative characters.

Code [ID]:

SCSB201018V18S01A0010 [0003247]

Full paper:

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