Inheritance mode and phenotypic variability for pericarp thickness in nor and rin tomato genotypes
Pericarp thickness as a component of fruit firmness represents an important feature of tomato fruit not only because of storing but also because of transporting fruit to the market. By using the method of full diallet (without reciprocal crosses), we carried out the crossing of two tomato lines with...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Serbian Association of Plant Breedings and Seed Producers
2000-01-01
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| Series: | Selekcija i Semenarstvo |
| Subjects: | |
| Online Access: | http://scindeks-clanci.ceon.rs/data/pdf/0354-5881/2000/0354-58810002015C.pdf |
| Summary: | Pericarp thickness as a component of fruit firmness represents an important feature of tomato fruit not only because of storing but also because of transporting fruit to the market. By using the method of full diallet (without reciprocal crosses), we carried out the crossing of two tomato lines with normal ripening and four mutant lines characterized by postponed shelf life (nor and rin). The genetic analysis was made on both parental lines and the progeny of F1 and F2 generations. The mode of inheritance for fruit firmness was estimated by using the significance test of mean values of F1 and F2 generations as compared to the mean values of their parents. The segregation of the genetic variance was performed by applying the Matter and Jinks method (1971), whereas the combining abilities were analyzed by the Griffing method (1956), method 2. mathematical model 1. As for the inheritance mode of pericarp thickness of tomato fruit, both investigated generations showed the following modes of inheritance: intermediary inheritance mode, partial dominance, dominance, as well as super dominance of a better and a worse parent. The dominance variance prevailed over the additive one. The highest heterosis for the feature pericarp thickness was recorded in the hybrid NR-1 x NR-10 (14.28%). The parent NR-3 was characterized by significant GCA values in both crossing generations, whereas the significant SCA values were recorded in six F1 hybrids. Mutant tomato genotypes had the larger pericarp thickness of the fruit than the genotypes with normal fruit ripening. Being characterized by these features, they should be included in the selection programs that are aimed at creating commercial f1 hybrids with thick pericarp and firm fruit. . |
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| ISSN: | 0354-5881 2406-209X |