INVESTIGATION OF THE CORRELATIONS BETWEEN QUANTITATIVE TRAITS WHICH DETERMINE YIELD IN THE VINE CULTIVAR BOLGAR AND THE HYBRID COMBINATION BOLGAR X RUSSALKA 1

The genotype–environment interactions and the inheritance of quantitative traits in a hybrid combination between a seeded grapevine cultivar and a seedless one (Armira × Rusalka 1) have been studied. It has been found that the selection of valuable hybrid forms shall become more efficient when conducted according to the traits ‘flowering – berry softening’, ‘berry softening – technological maturity’, ‘cluster weight’, ‘weight of 100 berries’ and ‘acids’. Dominant gene interactions with the environment are characterized by significantly greater intensity in comparison to those of additive genes. Inheritance in F1 progeny manifests very high values for the traits ‘budding’, ‘flowering’, ‘budding – flowering’, ‘flowering – berry softening’, ‘berry softening – technological maturity’, ‘berry length’. ‘berry width’, ‘weight of 100 berries’, ‘sugars’ and ‘acids’. According to the genetic stability of the dominant parameter interacting with the environment, a comparative evaluation can be made for each trait and, depending on the selection purpose, elite hybrid plants can be singled out, which possess a combination of the most important commercial traits.

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INVESTIGATION OF THE VARIABILITY OF QUANTITATIVE TRAITS IN A HYBRID COMBINATION BETWEEN A SEEDED AND SEEDLESS VINE CULTIVAR (Vitis vinifera L.)

Agricultural sciences ◽

10.22620/agrisci.2009.01.002 ◽

2009 ◽

Vol 1 (1) ◽

pp. 13-18

Author(s):

Venelin Roytchev ◽

Todorka Mokreva

Keyword(s):

Vitis Vinifera ◽

Quantitative Traits ◽

Vitis Vinifera L ◽

Hybrid Combination

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Genetic Control and Heterosis of Quantitative Traits in Several Local Eggplant Genotypes

Notulae Scientia Biologicae ◽

10.15835/nsb9410122 ◽

2017 ◽

Vol 9 (4) ◽

pp. 520-524 ◽

Cited By ~ 1

Author(s):

Ndueso Michael AKPAN ◽

Peter Ejimofor OGBONNA ◽

Vincent Nduka ONYIA ◽

Emeka Chibuzor OKECHUKWU ◽

Ima-obong Ignatius DOMINIC ◽

...

Keyword(s):

Quantitative Traits ◽

Gene Action ◽

Agronomic Traits ◽

Fruit Yield ◽

Yield Traits ◽

Breeding Method ◽

Gene Effect ◽

Hybrid Combination ◽

Diallel Mating Design ◽

Half Diallel

The present study was performed to assess the nature of gene action governing inheritance of agronomic traits in eggplant genotypes and extent of mid parent heterosis (MPH) and better parent heterosis (BPH) in six eggplant hybrids generated from four superior and optimally divergent genotypes of eggplant namely ‘Yalo’, ‘Uyo’, ‘K3’ and ‘Iyoyo’ selected from the germplasm and were crossed in 4×4 half diallel mating design. The six hybrids were found to show a significant (p< 0.05) positive MPH in yield traits and the highest was obtained in the hybrid ‘Yalo’ × ‘K3’ for number of fruits per plant (158.90%) and ‘K3’ × ‘Iyoyo’ for fruit yield per plant (63.14%) and fruit yield per hectare (62.20 %). The hybrid combinations ‘Yalo’ × ‘K3’ and ‘K3’ × ‘Iyoyo’ had significant positive BPH for the number of fruits per plant, 104.08% and 42.43%, respectively. For fruit yield per plant, the hybrid combination ‘Yalo’ × ‘K3’ (7.93%), ‘Uyo’ × ‘K3’ (8.48%) and ‘K3’ × ‘Iyoyo’ (12.26%) had significant positive BPH. However, the hybrid ‘K3’ × ‘Iyoyo’ (11.51%) showed significant positive BPH in fruit yield per hectare. Dominance and dominance × dominance gene effect were found to be positively higher in magnitude in all crosses for number of fruits per plant, fruit yield per plant and fruit yield per hectare. The prevalence of dominance and dominance × dominance gene effect in the yield traits indicate heterosis breeding as the best breeding method to improve the productivity of eggplant.

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