Korubin - Aleksoska, Ana (2015) STABILITY OF THE DRY YIELD IN SOME NEW AND OLD DOMESTIC TOBACCO VARIETIES IN THE REPUBLIC OF MACEDONIA. Тутун/Tobacco, 65 (1-6). pp. 8-15. ISSN 0494-3244
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Investigations were carried out with five commercial oriental varieties of Prilep tobacco (P–23, P–84, NS–72,
P–66–9/7 and P–79–94) and five old domestic oriental tobaccos of the types: Prilep (P 10–3/2 and P 12–2/1),
Djebel (Dj № 1) and Yaka (YK 7–4/2 and KY), to study dry mass yield per stalk. The trial was set up in the
Experimental field of Tobacco Institute–Prilep in 2011, 2012, 2013 and 2014, in randomized block design with
three replications, using traditional agricultural practices.
The aim of investigations was to evaluate the variability of some autochthonous and commercial tobacco varieties
through biometric analysis of the above quantitative trait and thus to give assessment of their stability and guidance
for their further spread and maintenance. The study will show the differences in yield between old and new
varieties, by which it will confirm the improvements in tobacco selection.
The high significance in yield between varieties is genetical indicator of their mutual difference. Differences
between the years of research are not significant, which is an indication that dry mass is highly heritable trait and
varietal characteristic. Statistical parameters of variability are low, which is an indication of stable and homozygous
genotypes, adapted to agro–ecological conditions of the region. Results on the standard deviation and variability
coefficient were lower in 2014, because the seed sown in this crop was obtained from a single stalk for each variant
isolated in 2011 and the same procedure was used in 2012 and 2013. The obtained data reveal that all investigated
varieties are stable but the most stable one is P–66–9/7, which also has the highest yield. Minimal and insignificant
advantage in stability was recorded in the old non-commercial varieties. The average yield of the new varieties
was 173% higher than that of the old domestic varieties. This is the best confirmation of the successful work of
Tobacco Institute in the selection of oriental aromatic tobaccos. By evaluation of varietal stability, the breeder gets
better knowledge on their homozygosity and higher reliability in choosing parental pairs for the implementation
of selection programs.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | tobacco (Nicotiana tabacum L.), yield, standard deviation, variability coefficient. |
| Subjects: | Scientific Fields (Frascati) > Agricultural Sciences > Agriculture, forestry and fisheries |
| Divisions: | Scientific Tobacco Institute |
| Depositing User: | Prof. d-r. Ana Korubin - Aleksoska |
| Date Deposited: | 02 Apr 2020 18:43 |
| Last Modified: | 02 Apr 2020 18:43 |
| URI: | https://eprints.uklo.edu.mk/id/eprint/4661 |
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