INBREEDING DEPRESSION AND EXPECTANT GENETIC ADVANCE IN F2 HYBRIDS FABA BEAN (Vicia faba L)

AL-Hamdany, Shamil

doi:10.33899/magrj.2017.161369

	INBREEDING DEPRESSION AND EXPECTANT GENETIC ADVANCE IN F2 HYBRIDS FABA BEAN (Vicia faba L)
Mesopotamia Journal of Agriculture
Article 6, Volume 45, Issue 4, 2017, Pages 69-84 PDF (685.05 K)
Document Type: Research
DOI: 10.33899/magrj.2017.161369
Author
Shamil AL-Hamdany^*
Hort. & Landscape Design Dept., College of Agriculture and Forestry, Mosul University. Iraq
Abstract
The study aimed to evaluate the performance of hybrids and their parents for identify promising hybrids and the objectives to develop single cross hybrids in addition to estimate inbreeding depression , some genetic parameters , phenotypic and genotypic correlation for the studied characters. An experiment was conducted by using four varieties of faba bean (Vicia faba L.) viz., 1- French (Aguadulce) 2- Syrian (Shami) 3- Spain and 4- Holland , were Full diallel crossing carried out according to (Griffing 1956) first method (Model I) to produce F₂-Hybrids of twelve single hybrid from self pollination of F₁ hybrid during the growing season 2009/2010. The parents and F₂hybrid were planted by using Randomized Complete Block Design (R.C.B.D.) with three replications at vegetable field of the Horticulture and landscape design department , College of Agriculture and Forestry , Mosul University , during the growing season 2010/2011. Results showed that parents and F_2S were significantly different for all the studied characters , parent 1- French (Aguadulce) was found to be the best for green , dry pods yield , seeds yield and biological yield , whereas the hybrid (2×3) for the green , dry pods yield and seeds yield , while the hybrid (2×1) for the biological yield. F₂ hybrid exhibited a significant inbreeding depression for all the studied characters. A significant additive variance were found for all studied characters except date flowering and no.of seeds per pod. Narrow sense heritability was higher for: Plant height , no.of branches/plant , pod length , 100 seed weight , green , dry pods yield and seeds yield , which indicated an additive gene action for these characters. Over dominance were found for: flowering , maturity date , no.of pods/plant , no.of seeds per pod and biological yield. Genetic advance expectant in F₃ hybrid were found for most studied characters , which indicates the importance of selection for improving these characters. The higher phenotypic and genotypic correlation were found between dry pods yield and seeds yield.
Keywords
diallel cross; inbreeding depression; Genetic Advance and Faba bean

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