| Popis: |
Twenty new lines of indeterminate tomato (F6) were selected from two F2 generations, which exhibited high homogeneity based on estimated CV% values for plant height, number of leaves/plant, fruit length, fruit diameter and TSS% content during successive six seasons from 2012/2013 to 2017/2018 at the Experimental Farm, Faculty of Environmental Agricultural Sciences, Arish University, North Sinai under greenhouse conditions. The experimental work was conducted using a Randomized Complete Blocks Design with three replications. A highly significant differences were observed among the selected lines for all studied characters. Lines that showed the most vigorous growth were VL-4-1, VL-4-4, VL-5-1, VL-2-3, VL-7-4 and IR-44-2 and for total yield were VR-6, VR-6-40, IRS-43-2, IR-44-1 and IR44-2.The estimated genetic parameters revealed low differences between phenotypic and genotypic coefficient of variations for all studied traits indicating low environmental effects, and the phenotypic selection was effective and suitable for improvement the tomato. High GCV / PCV % ratios were detected for most studied traits, which suggest that the genetic improvement through selection is possible. The high estimates of heritability in broad sense which ranged from 82.44 to 99.63% support the possibility of using selection programme. The importance of selection was also supported by the estimated high heritability coupled with high genetic advance as percent of mean for all studied traits. |
