Epistatic gene effects on the yield of the parents of F1, F2, BC1 and BC2 progeny |
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Authors: | Jasmina Zdravković Marković Živoslav Mijatović Mirjana Zečević Bogoljub Zdravković Milan |
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Institution: | (1) Centre for Vegetable Crops, Karadjordjeva 71, 11420 Smederevska Palanka, Yugoslavia |
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Abstract: | The genetic analysis of 5 tomato hybrids (Danubius F1, Luna F1, Lido F1, Balkan F1 and Mi-10 F1) was made. We produced their F1, F2, BC1 and BC2 generations and analysed their yield (on the first three flower branches) as well as some of the yield components of tomato
fruits (mean fruit weight, mean fruit weight on the first flower branch, fruit length, fruit width, and number of locules).
In order to estimate the gene effects, we applied the additive-dominance mode with three and six parameters. Epistatic gene
effects were estimated by applying the six-parameter mode (Mather and Jinks 1982). As for yield and yield components, there
were significant differences between the mean values of parents and their progeny. On the basis of the investigated genetic
parameters, the obtained results suggested that the additive and dominance gene effects prevailed in the yield and yield components
(Danubius F1, Luna F1, Lido F1, Mi-10 F1), whereas epistatic gene effects were excluded. As for the hybrid Balkan F1, we recorded significant gene effects, both the additive and the dominance ones in the yield inheritance: additive x additive
and dominance x dominance (with the negative sign). The estimated values of the epistatic gene effects were the most prominent
in inheriting the feature average fruit weight on the first flower branch — additive x dominance gene effects. They represented
the most frequent type of the interallele interaction recorded in the investigated hybrids. |
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Keywords: | gene effects tomato yield yield components |
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