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Abstract Detail



Genetics Section

Meyer, Rachel [1], Pires, Ines [2], Flowers, Jonathan [3], Purugganan, Michael [1].

If Vavilov had whole genomes: the homological versus unique nature of African rice domestication.

Nikolai Vavilov established the Law of Homologous Series of Variation by observing the habit and phenotypes of domesticated species and wild counterparts. Nearly 100 years later, we continue to find, at high frequency, examples of homologous series, depicting the parallel nature of domestication among even distantly-related crop species with orthologous genes instead of morphological phenotypes. For example, the same locus controls shattering across many poaceous crops, and fruit size in melon, tomato, and eggplant have been proposed to be controlled by the same transcription factors. Here, we performed whole genome resequencing on 102 African rice (Oryza glaberrima Steud.) landraces and 57 diverse Asian rice (O. sativa L.) cultivars.  These rices arose from independent domestication of separate wild ancestors. Three analyses were done to test the extent domestication acted in parallel on the genome. Functional mutations and copy number differences in candidate genes involved in domestication, diversification, and stress tolerance in crops were explored in both species. Genomes were scanned for high Fst, and a cross-population composite likelihood ratio test was implemented, for evaluation of parallel selective sweeps. Our analysis reveals a comprehensive set of mutations that have accumulated in two closely related crop species and sheds light on the process of parallel evolution in independent domestication events.


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1 - New York University, Center for Genomics and Systems Biology, 12 Waverly Place, New York, NY, 10003, United States
2 - Universidade Nova de Lisboa and Instituto de Biologia Experimental e T, Instituto de Tecnologia Quimica e Biologica , Av. da Republica, 2780-157 , Oeiras, Portugal
3 - New York University, Center for Genomics and Systems Biology, 12 Waverly Place, New York, NY , 10003, USA

Keywords:
none specified

Presentation Type: Oral Paper:Papers for Sections
Session: 22
Location: Rapids/Grove
Date: Tuesday, July 29th, 2014
Time: 10:45 AM
Number: 22007
Abstract ID:699
Candidate for Awards:Margaret Menzel Award


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