ADAPTIVE ABILITY OF LEAF LETTUCE GENOFOND OBTAINED ON THE BASIS OF INTERVARIETAL HYBRIDIZATION

Authors

  • Yu. V. Tkalich Lighthouse Research Station of the Institute of Vegetables and Melons of NAAS , Дослідна станція “Маяк” Інституту овочівництва і баштанництва НААН
  • S.I. Kondratenko Institute of Vegetables and Melons of NAAS , Інститут овочівництва і баштанництва НААН

DOI:

https://doi.org/10.31548/dopovidi2016.02.005

Keywords:

leaf lettuce, source material for selection, adaptability, intervarietal hybridization

Abstract

 The variability of quantitative traits due to growing conditions and “genotype-environment” interaction always occurs in the process of growing crops. In this connection the matter of environmental stability of crop-growing was always paid special attention. Therefore, to ensure sustainable harvests of native varieties and F1 hybrids of vegetable plants species it is important to create source material for selection not only with high vegetable productivity and quality potential, but with stable display of valuable traits in varying stress conditions that appear in different ecological and geographical zones of Ukraine.

Objective of the research: to analyze the adaptive properties of leaf variety seed lettuce genofon created on the basis of intervarietal hybridization and allocate valuable source of productivity and adaptability for varietal selection.

Methods of research. The research was conducted in accordance with VIR (All-Russian Institute of Plant Industry) method for studying collections of rare crops, according to work plans for current standards. During the growing period of plants the phenologic observations were carried out: dates of seeding, sprouting, appearance of first true leaf, early (10%) and mass (75%) onset of economic suitability, shooting, flowering, seeds ripening.

Research results.The results of scientific research as for studying source material for varietal selection of leaf variety seed lettuce on adaptive capacity are highlighted. As a result of 3-year research (2013-2015) 5 promising hybrids of F7-F12 generation were identified, which showed low response to the impact of growing conditions and showed high stability of “Productivity” trait display in growing conditions. These samples were forms with low response to growing conditions unlike Snizhynka variety (K-7283) with which they were compared. Among the studied samples of lettuce hybrids two samples were distinguished (F7 (Sharmalynovyi / Risnusag) (K-7276) and F8 (Vahomyi / Mya Hilde) (K-7286)), which statistically significantly exceeded breed-standard in productivity by4.72-7.18%.

Conclusions. The conducted statistical analysis of adaptive capacity of hybrid samples of leaf lettuce allowed to identify 5 samples out of 10 studied hybrid genotypes, which in growing conditions demonstrated low response to the impact of growing conditions, were distinguished by high stability of “Productivity” trait manifestation and are a valuable source material for varietal selection.

 

References

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Issue

No. 2 (59) (2016)

Section

Biology, biotechnology, ecology

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