ارزیابی عملکرد و کیفیت میوه در برخی ژنوتیپ های گوجه فرنگی گلخانه ای

This study was done to investigate and compare fruit yield, yield components, morphological traits and fruit quality of greenhouse tomato genotypes in order to use them as selection criteria. Progenies of 49 crosses of greenhouse tomato together with their 13 parents were evaluated using Randomized Complete Block Design with three replications. The highest amount of fruit yield was observed in the  progenies of the crosses 20, 25 and 46. On the other hand, the progenies of the  crosses 17 and 18, which showed the highest amount of fruit quality, also had a suitable fruit yield. The highest number of fruits was observed in the progenies of the crosses 18, 16 and 19. In order to selecte the most effective traits as the selection criteria, broad and narrow sense heritabilities were estimated under two growing seasons by uniparental-perogeny, biparental-perogeny regression, and parental-perogeny correlation. The amount of broad sense heritability ranged from 45 to 92% in the  first season and from 43 to 80% in the second one. Therefore, the traits including the total fruit yield, fruit weight, pericarp thickness, Brix, and PH were suggested for selecting the best genotypes, because of the higher level of heritability in these traits. Higher amounts of narrow-sense heritability in number of fruit per cluster and internode length suggested that these traits are appropriate as selection criteria. But the results showed that selection criteria varied in different environmental conditions.