Journal of Agricultural Sciences, Belgrade 2011 Volume 56, Issue 3, Pages: 165-172
https://doi.org/10.2298/JAS1103165A
Full text ( 253 KB)
Degree of inheritance and heritability of yield in parental genotypes and F1 hybrids of tobacco
Aleksoski Jane A. (McLaren’s nurseries, Lanarkshire, Glasgow, Scotland, United Kingdom)
Korubin-Aleksoska Ana T. (Scientific Tobacco Institute - Prilep, Prilep, Republic of Macedonia)
The mode and level of inheritance of green and dry mass yield per stalk were
investigated in four parental genotypes (Burley - B 2/93, Suchum - S1, Suchum
- S2 and Prilep - P-84) and in their six diallel F1 hybrids. The trial was
set up in 2007, 2008 and 2009 in the field of Tobacco Institute-Prilep in a
randomized block design with four replications. The aim of the investigation
was to estimate the heritability as an indicator of the inheritance of the
yield as one of the most important quantitative characters of tobacco, in
order to give suggestions for the selection of parental genotypes and
directions for the creation of new varieties. The mode of inheritance was
estimated according to the test - significance of the mean value of F1
progeny compared to the parental average. Narrow-sense heritability was
estimated after Allard (1960), while broad-sense heritability and genetic
components were estimated after Mather and Jinks (1974). The mode of
inheritance in the hybrids was different. Positive heterosis for green and
dry mass yields per stalk was recorded in S1 x S2. Negative heterosis for
green mass yields per stalk was recorded in S1 x P-84 and S2 x P-84, while
for dry mass yield it was recorded in S1 x P-84. Inheritance of the
characters during the three years of investigation was identical. The higher
heritability index of both types was recorded for dry mass yield. As regards
inheritance of the yield, the values of broad-sense heritability were higher
than those of narrow-sense heritability.
Keywords: tobacco, heredity, green and dry mass yield per stalk, heterosis, narrow-sense and broad-sense heritability (h2)