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Diallel cross analysis of traits related to growth and survival of ornamental fish (Puntius tetrazona)
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H. Akbari   , Gh. Dashab1 |
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Abstract: (8718 Views) |
| Intra species hybridizations have been extensively used to produce varieties with superior characteristics for use in aquatic animals. In this study, maternal effects, general and specific combining ability, heterosis and inbreeding depression of growth-related traits, including weight gain, changes in length, weight, body length and width, as well as losses in the form of a complete diallel cross in pure and cross breed results is analyzed in three strains of Green and Albino Tiger Barb. The results showed that the highest rates of maternal effects on traits was related to species such as Albino and mother line had the best performance compared to other species. General combining ability for Green Barb in the three traits (body weight, body length and width) and two species of Albino trait body weight gain and changes was higher during the performance. Comparison of the ability of a particular compound represents an albino genetic gene pool as well as line paternal mother, in combination with other two species. Investigation about the amount of heterosis showed that its value in four traits of length, weight, length and width, were negative, but the rate of weight gain and mortality were positive. These two traits indicated high genetic distance between parents. The inbreeding depression, the highest rate of body length and the lowest among growth traits were related to weight gain. |
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| Keywords: Diallel cross, Ornamental fish, Genetic combining ability, Specific combining ability, Heterosis |
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Full-Text [PDF 918 kb]
(3157 Downloads)
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Type of Study: Research |
Subject:
بيوسيستماتيك آبزيان
Received: 2015/05/3 | Accepted: 2015/05/3 | Published: 2015/05/3
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