STABILITY OF THE DRY YIELD IN SOME NEW AND OLD DOMESTIC TOBACCO VARIETIES IN THE REPUBLIC OF MACEDONIA

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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Abstract

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: http://eprints.uklo.edu.mk/id/eprint/4661

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