Strawberry sex-determining traits-Ashman-2012

Project Overview
Project Name Strawberry sex-determining traits-Ashman-2012
Project type QTL
Crop Strawberry
Description We studied the natural hybrid (Fragaria ananassa subsp. cuneifolia) between two sexually dimorphic octoploid strawberry species (Fragaria virginiana and Fragaria chiloensis) to gain insight into the dynamics of sex chromosomes and the genesis of sexual dimorphism. Male sterility is dominant in both the parental species and thus will be inherited maternally, but the chromosome that houses the sex-determining region differs. Thus, we asked whether (1) the cytotypic composition of hybrid populations represents one or both maternal species, (2) the sex-determining chromosome of the hybrid reflects the location of male sterility within the maternal donor species and (3) crosses from the hybrid species show less sexual dimorphism than the parental species. We found that F. ananassa subsp. cuneifolia populations consisted of both parental cytotypes but one predominated within each population. Genetic linkage mapping of two crosses showed dominance of male sterility similar to the parental species, however, the map location of male sterility reflected the maternal donor in one cross, but not the other.
Contact
NameDetails
Tia-Lynn Ashman
First name:T
Last name:Ashman
Title:Agricultural research technician
Institution:University of Pittsburg, 1Department of Biological Sciences
Address:Pittsburg, PA 15260, USA
Country:USA
Email:tia1@pitt.edu
Traits
This project contains 1 Traits:
Name
fruit set
Page
1
QTL
This project contains 3 QTL:
Download Table
Linkage GroupNameTypeStartStopPeak
Page
1