Gene flow among wild and domesticated almond species: insights from chloroplast and nuclear markers.
Malou Delplancke,Nadir Alvarez,Anahí Espíndola,Hélène Joly,Laure Benoit,Elise Brouck,Nils Arrigo +6 more
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TLDR
High genetic diversity levels in both species along with substantial and symmetric gene flow between the domesticated P. dulcis and the wild P. orientalis suggests that ad hoc transgene containment strategies would be required if genetically modified cultivars were introduced in the northwestern Mediterranean.Abstract:
Hybridization has played a central role in the evolutionary history of domesticated plants. Notably, several breeding programs relying on gene introgression from the wild compartment have been performed in fruit tree species within the genus Prunus but few studies investigated spontaneous gene flow among wild and domesticated Prunus species. Consequently, a comprehensive understanding of genetic relationships and levels of gene flow between domesticated and wild Prunus species is needed. Combining nuclear and chloroplastic microsatellites, we investigated the gene flow and hybridization among two key almond tree species, the cultivated Prunus dulcis and one of the most widespread wild relative Prunus orientalis in the Fertile Crescent. We detected high genetic diversity levels in both species along with substantial and symmetric gene flow between the domesticated P. dulcis and the wild P. orientalis. These results were discussed in light of the cultivated species diversity, by outlining the frequent spontaneous genetic contributions of wild species to the domesticated compartment. In addition, crop-to-wild gene flow suggests that ad hoc transgene containment strategies would be required if genetically modified cultivars were introduced in the northwestern Mediterranean.read more
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New insight into the history of domesticated apple: secondary contribution of the European wild apple to the genome of cultivated varieties.
Amandine Cornille,Amandine Cornille,Amandine Cornille,Pierre Gladieux,Pierre Gladieux,Pierre Gladieux,Marinus J. M. Smulders,Isabel Roldán-Ruiz,François Laurens,François Laurens,François Laurens,Bruno Le Cam,Bruno Le Cam,Bruno Le Cam,Anush Nersesyan,Joanne Clavel,Joanne Clavel,Joanne Clavel,Marina V. Olonova,Laurence Feugey,Laurence Feugey,Laurence Feugey,Ivan Gabrielyan,Xiu-Guo Zhang,Maud I. Tenaillon,Tatiana Giraud,Tatiana Giraud,Tatiana Giraud +27 more
TL;DR: It is shown that the evolution of domesticated apples occurred over a long time period and involved more than one wild species, supporting the view that self-incompatibility, a long lifespan, and cultural practices such as selection from open-pollinated seeds have facilitated introgression from wild relatives and the maintenance of genetic variation during domestication.
Journal ArticleDOI
The Genomic Signature of Crop-Wild Introgression in Maize
Matthew B. Hufford,Pesach Lubinksy,Tanja Pyhäjärvi,Michael T. Devengenzo,Norman C. Ellstrand,Jeffrey Ross-Ibarra +5 more
TL;DR: This study assessed patterns of genome-wide introgression based on 39,029 single nucleotide polymorphisms genotyped in 189 individuals from nine sympatric maize-mexicana populations and reference allopatric populations and found widespread evidence forintrogression in both directions of gene flow.
Journal ArticleDOI
Evolutionary Insights into the Nature of Plant Domestication
TL;DR: Four new insights into plant domestication are discussed - that in general domestication is a protracted process, that unconscious (natural) selection plays a prominent role, that interspecific hybridization may be an important mechanism for crop species diversification and range expansion, and that similar genes across multiple species underlies parallel/convergent phenotypic evolution between domesticated taxa.
Journal ArticleDOI
What is the relevance of smallholders’ agroforestry systems for conserving tropical tree species and genetic diversity in circa situm, in situ and ex situ settings? A review
Ian K. Dawson,Manuel R. Guariguata,Judy Loo,John C. Weber,A.G. Lengkeek,David Bush,Jonathan P. Cornelius,Luigi Guarino,Roeland Kindt,Calleb Orwa,Joanne Russell,Ramni Jamnadass +11 more
TL;DR: In this article, the authors critically review the evidence for these mechanisms, and highlight areas for research and for intervention so that agroforestry practices can better support conservation in each setting, with an emphasis on often neglected genetic-level considerations.
Journal ArticleDOI
Mutation of a bHLH transcription factor allowed almond domestication
Raquel Sánchez-Pérez,Raquel Sánchez-Pérez,Stefano Pavan,Stefano Pavan,Rosa Mazzeo,Rosa Mazzeo,C. Moldovan,R. Aiese Cigliano,J. del Cueto,Francesca Ricciardi,Francesca Ricciardi,Concetta Lotti,Luigi Ricciardi,Federico Dicenta,Rosa L. López-Marqués,B. Lindberg Møller +15 more
TL;DR: The completion of the almond reference genome is reported, finding a nonsynonymous point mutation in the dimerization domain of bHLH2 prevents transcription of the two cytochrome P450 genes, resulting in the sweet kernel trait.
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