GENE ACTION OF SOME AGRONOMIC TRAITS IN TOMATO Lycooersicon esculentum L. | ||||
| Journal of Plant Production | ||||
| Article 9, Volume 29, Issue 12, December 2004, Page 6961-6973 PDF (3.46 MB) | ||||
| Document Type: Original Article | ||||
| DOI: 10.21608/jpp.2004.238947 | ||||
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| Authors | ||||
| A. H. Amer,; Ikram M. EI-Ghareeb | ||||
| Horticulture Res. Inst. Giza (Egypt). | ||||
| Abstract | ||||
| The (S4) of the cultivars, Prichard; Cal Rock; Beto 98; Ace 55 VF; Floradade; Super strain B and Money Maker was obtained to be used in this study. 7x7 crosses in a full diallel fashion were detected to determine gene action on some agronomic traits, i.e number of flowers per cluster; number of flowers per plant, fruit weight, total yield per plant, total soluble solids, and fruit pH. The analysis of variances indicated that the differences among the genotypes were highly significant. Test of validity (e) values was insignificant, this finding confirmes the assumption of diallel analysis fashion. The regression coefficient (b) between both variance Wr and Vr was insignificant indicating the presence of non allelic interaction. Dominance gene effects were important than additive for most traits except total soluble solids and fruit pH influenced by additive and dominance effects. Moreover, over dominance characterized all studied traits. The proportion of positive and negative alleles were equally distributed among the parents for the traits number of flowers per cluster and per plant as well as total yield. The number of genes that affect the traits, ranged as their ascending order from (0.14&- 0.158 - 2.330 - 4.066 - 4.092 - 4.271) for the total soluble solids; fruit pH; fruit weight; total yield per plant; number of flowers per plant; and number of flowers per cluster traits respectively. Moderate estimates of narrow sense heritability were recorded for most agronomic traits except total soluble solids and fruit ph showed low narrow sense heritability. The graphic analyses revealed that, over dominance effects ply an important role in the inheritance of most traits. Money Maker and Floradade parents had most dominant genes for most traits, while mo~t recessive genes were detected by Prichard and Beto 98. | ||||
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