naa a22 4500 510730582 CHVBK 20180411082951.0 cr unu---uuuuu 180411e20130601xx s 000 0 eng 10.1007/s11295-012-0578-4 doi (NATIONALLICENCE)springer-10.1007/s11295-012-0578-4 Identification of QTLs controlling seed dormancy in peach ( Prunus persica ) [Elektronische Daten] [Kendra Blaker, José Chaparro, Thomas Beckman] 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 20cM. 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. Springer-Verlag Berlin Heidelberg, 2012 Peach nationallicence Seed dormancy nationallicence Quantitative trait loci nationallicence Stratification nationallicence Germination nationallicence AG : Abnormal growth nationallicence CU : Chilling unit nationallicence G : Linkage group nationallicence GD : Germination date nationallicence GDH : Growing degree hour nationallicence HR : Heat requirement nationallicence QTL : Quantitative trait loci nationallicence SR : Stratification requirement nationallicence Blaker Kendra University of Florida, Fifield Hall, 32611, Gainesville, FL, USA aut Chaparro José University of Florida, Fifield Hall, 32611, Gainesville, FL, USA aut Beckman Thomas Southeastern Fruit and Tree Nut Research Laboratory, USDA-Agricultural Research Service, 21 Dunbar Road, 31008, Byron, GA, USA aut Tree Genetics & Genomes Springer-Verlag 9/3(2013-06-01), 659-668 1614-2942 9:3<659 2013 9 11295 https://doi.org/10.1007/s11295-012-0578-4 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s11295-012-0578-4 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Blaker Kendra University of Florida, Fifield Hall, 32611, Gainesville, FL, USA aut NATIONALLICENCE 700 1- Chaparro José University of Florida, Fifield Hall, 32611, Gainesville, FL, USA aut NATIONALLICENCE 700 1- Beckman Thomas Southeastern Fruit and Tree Nut Research Laboratory, USDA-Agricultural Research Service, 21 Dunbar Road, 31008, Byron, GA, USA aut NATIONALLICENCE 773 0- Tree Genetics & Genomes Springer-Verlag 9/3(2013-06-01), 659-668 1614-2942 9:3<659 2013 9 11295 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer