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Influence of the maternal form on the creation of performance hybrids Lavandula angustifolia Mill.


Author: Maşcovţeva Svetlana
Degree:doctor of agriculture
Speciality: 06.01.05 - Breeding and Seed Production
Year:2018
Scientific adviser: Maria Gonceariuc
doctor habilitat, professor, Institute of Genetics, Physiology and Plant Protection of the ASM
Institution: Institute of Genetics, Physiology and Plant Protection of the ASM

Status

The thesis was presented on the 28 February, 2018
Approved by NCAA on the 11 May, 2018

Abstract

Adobe PDF document – 1.18 Mb / in romanian
Adobe PDF document – 1.22 Mb / in russian

Thesis

CZU 33.8: 631.527

Adobe PDF document 3.60 Mb / in russian
164 pages

Keywords

Lavandula angustifolia Mill, breeding, hybrid, polycross, heterosis, variability, heritability, variety-clone, maternal forms, essential oil.

Summary

The thesis consistsof an introduction, 4 chapters, conclusions, practical recommendations, a bibliography comprising 222 sources, 1 annexe. The volume is 138 pages, 48 tables, 22 photos, 20 figures. The results are published in 12 scientific papers.

Field of research: Plant breeding and seed production.

The aim of the work is to study the influence of maternal forms on the creation of selective material for the breeding of Lavandula angustifolia Mill. with advanced quantitative characteristics.

Objectives: The study of quantitative traits of productivity and the effect of heterosis in F1 hybrids in comparison with maternal forms. Determination of the influence of maternal forms on the heritability of quantitative characteristics of productivity, including the evaluation of the content and quality of essential oil in F1 hybrids. Creation of new variety- clones of lavender and hybrids with high heterosis effect.

Scientific novelty and originality of the idea: The influence of maternal forms on the quantitative characteristics of productivity, including the quality and content of essential oil in F1 hybrids of Lavandula angustifolia Mill. created by polycross hybridization, was confirmed. The positive effect of heterosis in F1 hybrids on the content of essential oil in comparison with maternal forms was revealed. A variable initial selective material with different genetic potential and geographic origin was created. Promising hybrids with a high heterosis effect in all quantitative characters in relation to maternal forms used in the creation of new, original variety-clones of lavender have been obtained.

The solution of an important scientific problem consists in the scientific substantiation of the use of maternal forms in the creation of a new variable breeding material of Lavandula angustifolia Mlll. Purposeful use of new genotypes with distinctive quantitative characteristics, which allowed creating original variety-clones of lavender.

The theoretical significance of the work: The influence of maternal forms on the value of quantitative traits and the effect of heterosis in polycross F1 hybrids of lavender has been confirmed. F1 hybrids with high, low and medium variability of quantitative traits in relation to the maternal form have been identified. The obtained data allowed selecting F1 hybrids with the high heterosis effect. The data presented in the work allow using the obtained breeding material in the creation of original varieties of lavender.

Practical value of the work: F1 hybrids of lavender with a high level of heritability and variability of quantitative traits were created. Selected F1 hybrids are used to create varieties with increased productivity. New created varieties of lavender Fr.5S-8-24 and Cr.13S-6-35 are tested in the Competitive Variety Test.

Implementation of scientific results: The obtaining planting material by the method of vegetative reproduction was introduced in the farm "Girlea Andrei Pavel", Rezina, and the firm SC Ecoland Production SRL, Botosani, Romania.