In a paper recently published in Plant Biology, we have identified environmental differences between niches occupied by diploids and tetraploids Erysimum mediohispanicum.
To evaluate the adaptive significance of the geographic distribution of cytotypes, we characterized the ploidy level of 118 populations across the Iberian Peninsula and obtained their interpolated climate variables from the Worldclim 1.4. In addition, we also characterized floral phenotype of both cytotypes.
We found a clear geographic pattern in the distribution of cytotypes, with diploid individuals occurring in the southernmost part of the distribution range, while tetraploids were found in the northern area. A contact zone between both cytotypes was identified but diploid and tetraploid individuals very rarely occur in sympatry. In this contact zone, both cytotypes grow at different altitudes, mean temperatures and precipitation.
Diploid and tetraploid populations clearly differ in corolla tube width and stalk diameter, and importantly depends on precipitation and temperature. In addition to climate, several soil variables also explained the geographic distribution of cytotypes, according to our niche models. The most consistent influence was found by the dominant parent material, with tetraploid populations growing in more diverse soil types.
Javier Valverde is now a rookie Doctor in Biology. He obtained his PhD in the University of Granada the past 9th of June, 2017. His PhD dissertation was entitled “Structured generalization: Evolutionary dynamics at a fine spatial scale in a generalist system” (“Generalización Estructurada: Dinámica Evolutiva a Escala Espacial Fina en un Sistema Generalista”).
Included in Annals of Botany‘s special issue on developmental robustness and species diversity, our papers nalyzes the role of pollinators in the evolution of the phenotypic variation, disparity and integration of the corolla shape of 111 Brassicaceae taxa. Read more
Our paper “The temporal dimension in individual-based plant pollination networks” has been published in Oikos. In this paper we present the temporal changes occurring in a pollination network established between individuals of the extremely generalist herb Erysimum mediohispanicum (Brassicaceae). Read more
It is now like a tradition to travel Morocco in February to sampling some crucifers. This year was not exception and we spent a week traveling ~ 4000 km from Granada to South Morocco and back. Read more
Ecological and genetic processes producing speciation: the interplay between hybridization, poliploidy, and local adaptation in generalist plants. A scientific project funded by the Ministerio de Economía y Competitividad.