Abstract Detail

Population Genetics

Adal, Ayelign Mengesha [1], Demissie, Zerihun A. [2], Mahmoud, Soheil S. [3].

Identification, validation and cross-species transferability of novel Lavandula EST-SSRs.

Lavenders (Lavandula) are important economical crops grown around the globe for essential oil production. In an attempt to develop genetic markers for these plants, we analyzed over 13,000 unigenes developed from L. angustifolia and L. x intermedia EST databases, and identified 3,459 simple sequence repeats (SSR), which were dominated by trinucleotides (41.2%) and dinucleotides (31.45%). Approximately 19% of the unigenes contained at least one SSR marker, over 60% of which were localized in the UTRs. Only 252 EST-SSRs were 18 bp or longer from which 31 loci were validated, and 24 amplified discrete fragments with 85% polymorphism in L. x intermedia and L. angustifolia. The average number of alleles in L. x intermedia and L. angustifolia were 3.42 and 3.71 per marker with average PIC values of 0.47 and 0.52, respectively. These values suggest a moderate to strong level of informativeness for the markers, with some loci producing unique fingerprints. The cross-species transferability rate of the markers ranges in 50 to 100% across eight species. The utility of these markers was assessed in eight Lavandula species and 15 L. angustifolia and L. x intermedia cultivars, and the dendrogram deduced from their similarity indexes successfully delineated the species into their respective sections and the cultivars into their respective species. These markers have potential for application in fingerprinting, diversity studies and marker-assisted breeding of Lavandula.

1 - University of British Columbia, Biology, 1177 Research Rd, Kelowna, BC, V1V 1V7
2 - Brock University,, Department of Biological sciences, 500 Glenridge Ave,, St. Catharines, ON, L2S 3A1, Canada
3 - University of British Columbia , Biology, 1177 Research Rd, Kelowna, BC, V1V 1V7, Canada

Keywords:
EST-SSR
Genetic marker
Lavandula
L. angustifolia
L. x intermedia
Polymorphism.

Presentation Type: Oral Paper:Papers for Topics
Session: 71
Location: Salon 6/The Shaw Conference Centre
Date: Wednesday, July 29th, 2015
Time: 1:45 PM
Number: 71002
Abstract ID:247
Candidate for Awards:CSPB President's Award for Best Student Presentation