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dc.contributor.author Govindarajulu, Rajanikanth
dc.contributor.author Liston, Aaron
dc.contributor.author Ashman, Tia-Lynn
dc.coverage.spatial Oregon
dc.coverage.spatial Pacific north west
dc.coverage.temporal Pliocene to Pleistocene
dc.date.accessioned 2012-10-12T17:39:40Z
dc.date.available 2012-10-12T17:39:40Z
dc.date.issued 2012-11-21
dc.identifier doi:10.5061/dryad.cn66t
dc.identifier.citation Govindarajulu R, Liston A, Ashman T (2012) Sex-determining chromosomes and sexual dimorphism: insights from genetic mapping of sex expression in a natural hybrid Fragaria × ananassa subsp. cuneifolia. Heredity 110(5): 430-438.
dc.identifier.uri http://hdl.handle.net/10255/dryad.43090
dc.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. Moreover, female function mapped to a single region in the first cross, but to two regions in the second cross. Aside from components of female function (fruit set and seed set), other traits that have been found to be significantly sexually dimorphic in the pure species were either not dimorphic or were dimorphic in the opposite direction to the parental species. These results suggest that hybrids experience some disruption of dimorphism in secondary sexual traits, as well as novel location and number of quantitative trait locus (QTL) affecting sex function.
dc.relation.haspart doi:10.5061/dryad.cn66t/1
dc.relation.isreferencedby doi:10.1038/hdy.2012.96
dc.relation.isreferencedby PMID:23169558
dc.subject Fragaria
dc.subject hybrid
dc.subject sexual dimorphism
dc.subject sex chromosome
dc.subject male sterility
dc.title Data from: Sex-determining chromosomes and sexual dimorphism: insights from genetic mapping of sex expression in a natural hybrid Fragaria × ananassa subsp. cuneifolia
dc.type Article *
dwc.ScientificName Fragaria × ananassa subsp. cuneifolia
dwc.ScientificName Fragaria chiloensis
dwc.ScientificName Fragaria virginiana
dc.contributor.correspondingAuthor Govindarajulu, Rajanikanth
prism.publicationName Heredity

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