Identification of QTLs controlling seed dormancy in peach (Prunus persica)

Publication Overview
TitleIdentification of QTLs controlling seed dormancy in peach (Prunus persica)
AuthorsBlaker KM, Chaparro JX, Beckman TG
TypeJournal Article
Journal NameTree genetics & genomes
CitationBlaker KM, Chaparro JX, Beckman TG. Identification of QTLs controlling seed dormancy in peach (Prunus persica). Tree genetics & genomes. 2013; 9(3):659-668.


Dormancy is a condition that delays or inhibits growth in seed, vegetative buds, and floral buds. In peach, seed germination occurs when seed accumulate sufficient stratification and growing degree hours to break dormancy and begin growing. Correlations have been reported between mean seed stratification requirements and mean bud chilling requirements among Prunus families, but an individual seed’s germination date and subsequent vegetative and floral bud break date are not correlated. Prior to this study, the genetic factors involved in regulating seed dormancy and their location on the peach genomic map were unknown. Segregating F₂ seed were collected from a high × low chill F₁ peach hybrid in 2005, 2006, and 2008. Germination date and growth habit was measured after the stratification requirement of the 2005 seed was fully met. The seed collected in 2006 and 2008 received varying amounts of stratification, which enabled data on stratification requirement, heat requirement, and growth habit to be collected. Genomic DNA was extracted from seedling leaf tissue and screened with SSR markers selected from the Prunus reference map at an average resolution of 20 cM. Seed dormancy quantitative trait loci (QTLs) were detected on G1, G4, G6/8, and G7. The QTLs detected on G6/8 and G7 were discovered in the same region as QTLs associated with floral bud chilling requirement and bloom time in peach.
This publication contains information about 1 projects:
Project NameDescription
This publication contains information about 10 features:
Feature NameUniquenameType
Leaf colorLeaf color-Grheritable_phenotypic_marker
germination dateqGMD-LAxF.LG1QTL
germination dateqGMD-LAxF.LG4QTL
germination dateqGMD-LAxF.LG6/8QTL
germination dateqGMD-LAxF.LG6/8.2QTL
germination dateqGMD-LAxF.LG7QTL
abnormal growth after insufficient stratificationqABNG-LAxF.LG6/8QTL
stratification requirementqSTFCR-LAxF.LG7QTL
stratification requirementqSTFCR-PS.LG7QTL
This publication contains information about 2 maps:
Map Name
Cross References
This publication is also available in the following databases:
AGL: USDA National Agricultural LibraryAGL:4786145