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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. |
Traits
This project contains 1 Traits:
Page 1
QTL
This project contains 3 QTL:
Linkage Group | Name | Type | Start | Stop | Peak |
Page 1
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