Informations et ressources scientifiques
sur le développement des zones arides et semi-arides

Titre : Genetical and biotechnological studies on drought tolerance in tomato

Auteur : Mohamed, Safiya Mohamed Yahia.

Etablissement de soutenance : Benha University .

Grade : Master of Science in Agricultural Science 2018

Résumé
The present study was carried out in a private farm, Kaha city, Kalyobiya Governorate, Egypt during summer seasons of 2015 and 2016 to study the genetic behavior of some economic traits for six tomato cultivars grown under normal irrigation and drought stress. This investigation was a half diallel F1 cross experiment to induce genetic variability by hybridization and evaluation and selection for best genotypes of tomato compared with the parents under drought conditions and normal irrigation. The six parental genotypes of tomato (Solanum Lycopersicum), i.e. Tan Shit Star (p1), Real Stone (p2), Pearsone Imp (p3), Super marmande (p4), Tomato Golden (p5) and Peto mech (p6) and their F1S hybrids were planted in successive summer plantings of 2016 under open field conditions using randomized complete block design (RCBD) with three replicates. Each experiment was designed in a randomized complete block design (R.C.B.D) with three replications. Each replication block had 21 plots (sex parental verities and their 15 F1 hybrids) under either drought or normal irrigation. The plot (experimental unit) was one ridge of 10.5 meter in length and the distance between plants was 50 cm apart, therefor, the plot contained 21 plants. Treatments in each replicate (parents + F1s) were randomly assigned to plots. Three plants were selected excluding border plants for recording the observation. These observations were in vegetative traits viz., stem length, number of branches, number of leaves, leaf area, plant fresh and dry weight ; flowering traits viz., number of days from planting date to first flower anthesis and fruit set % ; yield traits viz., fruits number and total fruit yield per plant as well as fruit traits viz., average fruit weight, length, diameter, total soluble solids percentage, total sugars and total polyphenols content in the fruit.

Présentation étendue (EULC)