Reproductive traits and evolutionary divergence between Mediterranean crops and their wild relatives
Iriondo, J. M.1; Milla, R.1; Volis, S.2; Rubio de Casas, R.3
Source PublicationPLANT BIOLOGY
AbstractChanges in reproductive traits associated with domestication critically determine the evolutionary divergence between crops and their wild relatives, as well as the potential of crop plants to become feral. In this review, we examine the genetic mechanisms of plant domestication and the different types of selection involved, and describe the particularities of domestication of Mediterranean field crops with regard to their reproductive traits, showing illustrative examples. We also explore gene flow patterns between Mediterranean field crops and their wild relatives, along with their ecological, evolutionary and economic implications. Domestication entails multiple selective processes, including direct selection, environmental adaptation and developmental constraints. In contrast to clonal propagation in perennials, sexual reproduction and seed propagation in annuals and biennials have led to a distinct pathway of evolution of reproductive traits. Thus, the initial domestication and further breeding of Mediterranean field crops has brought about changes in reproductive traits, such as higher mean values and variance of seed and fruit sizes, reduced fruit and seed toxicity, non-shattering seeds and loss of seed dormancy. Evolution under domestication is not a linear process, and bi-directional gene flow between wild and crop taxa is a frequent phenomenon. Thus, hybridisation and introgression have played a very important role in determining the genetics of current cultivars. In turn, gene flow from crops to wild relatives can lead to introgression of crop genes into wild populations and potentially alter the characteristics of natural communities. In conclusion, plant evolution under domestication has not only changed the reproductive biology of cultivated taxa, its effects are multifaceted and have implications beyond agriculture.
KeywordCrop Evolution Crop Wild Relatives Domestication Syndrome Gene Flow Mediterranean Crops Reproductive Traits Weeds
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Document Type期刊论文
Affiliation1.Univ Rey Juan Carlos, Area Biodiversidad & Conservac, Dept Biol Geol Fis & Quim Inorgan, C Tulipan S-N, E-28220 Madrid, Spain
2.Chinese Acad Sci, Kunming Inst Bot, Key Lab Plant Divers & Biogeog East Asia, Kunming, Yunnan, Peoples R China
3.Univ Granada, Fac Ciencias, Dept Ecol, Fuentenueva S-N, E-18071 Granada, Spain
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GB/T 7714
Iriondo, J. M.,Milla, R.,Volis, S.,et al. Reproductive traits and evolutionary divergence between Mediterranean crops and their wild relatives[J]. PLANT BIOLOGY,2018,20:78-88.
APA Iriondo, J. M.,Milla, R.,Volis, S.,&Rubio de Casas, R..(2018).Reproductive traits and evolutionary divergence between Mediterranean crops and their wild relatives.PLANT BIOLOGY,20,78-88.
MLA Iriondo, J. M.,et al."Reproductive traits and evolutionary divergence between Mediterranean crops and their wild relatives".PLANT BIOLOGY 20(2018):78-88.
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