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The genetic polymorphism in aspect of heterosis at Cucumis sativus L.

Author: Ozdemir Dogan
Degree:doctor of biology
Speciality: 03.00.15 - Genetics
Scientific adviser: Maria Duca
doctor habilitat, professor, Moldova State University
Scientific council:


The thesis was presented on the 27 March, 2008
Approved by NCAA on the 17 April, 2008


Adobe PDF document0.49 Mb / in romanian


CZU 575.222.78:582.982

Adobe PDF document 5.46 Mb / in romanian
120 pages


combining ability, Cucumis sativus L, heterozis, protein polymorphism, RAPD-PCR


The functional aspects of heterosis at plants, as photosynthesis, respiration, enzyme activity, biological active compounds, energetic metabolism, accumulation of nourishing compounds and fruited have been studied in detail by biochemists and physiologists, but many questions still remained unaccountable.

In this work there were assembled and analyzed experimental data that characterize some hybrid combinations of Cucumis sativus L. with different productivity and their parental forms on the effect of heterosis after different morphological and physiological parameters which allowed assessing the genetic polymorphism of cucumbers and determining some molecular genetic aspects of heterosis.

There were utilized five initial maternal forms of cucumber, three paternal lines (where Beregovoi and Favorit sorts was departmented) and seven hybrids of first generation (F1), where three of them (Н 273, Н 274, Н 275) were with high productivity and H6 and H7 hybrids – with low productivity. As control served first generation hybrids– Vzglead and Epilog.

There was shown the variability of different morphological and physiological characters being revealed the dependence between root system volume and catalase activity – the parameters that influence plant productivity. It was established the dependence between heterosis and genetic characteristics of parental forms, along with their combinative capacity. There were established the qualitative and quantitative peculiarities of total proteins and analyzed genetic polymorphism of homo- and heterozygote genotypes of Cucumis sativus L., which correlated with productivity and heterosis.