| Abstract Detail
Translational Genomics - Morning Ben Chaim, Arnon [1], Borovsky, Yelena [1], Zamir, Dani [2], Paran, Ilan [1]. Comparative mapping of genes controlling fruit morphology in tomato and pepper. FRUIT size and shape are among the most important traits that were under selection during domestication of the fruit-bearing Solanaceae crops, tomato and pepper. To study the genetic control of fruit morphology in pepper and to compare it to tomato we employed two approaches, QTL mapping and mutagenesis. Pepper QTL data for fruit weight, fruit shape and pericarp thickness were obtained from two crosses of the blocky-type parent, Cv. Maor (Capsicum annuum) with small-fruited accessions of C. annuum and C. frutescens. The tomato QTL data were derived from the analysis of two populations containing introgressions from Solanum pennellii and S. habrochaites in the background of the cultivated tomato S. lycopersicum. While fruit weight QTL were often conserved in pepper and tomato, fruit shape QTL, except one, were distinct in each species. The difference in the degree of QTL conservation in pepper and tomato between fruit weight and fruit shape indicates that while convergent domestication in these crops resulted from mutations and selection at common loci controlling fruit weight, selection for fruit shape occurred in most part at independent loci in these two genera. EMS mutagenesis and screening M2 families of Cv. Maor allowed the identification of several mutants with altered fruit size and shape. We are currently mapping selected mutants in order to determine whether or not the mutations correspond to known QTL.
Log in to add this item to your schedule
1 - Agricultural Research Organization, Plant Genetics and Breeding, The Volcani Center, Bet Dagan, 50250, Israel
2 - The Hebrew University of Jerusalem, The Institute of Plant Sciences and Genetics in Agriculture, Faculty of Agriculture, Food and Environmental Qua, Rehovot, 76100, Israel
Keywords:
Comparative genetics
Pepper
tomato
Fruit weight
Fruit shape.
Session: SAT05-4
Location: Hall of Ideas Room I/Monona Terrace
Date: Wednesday, July 26th, 2006
Time: 9:00 AM
Abstract ID:72 |
