Polygenic adaptation and negative selection across traits, years and environments in a long-lived plant species (Pinus pinaster Ait., Pinaceae)


Por: de Miguel, Marina, Rodriguez-Quilon, Isabel, Heuertz, Myriam, Hurel, Agathe, Grivet, Delphine, Pablo Jaramillo-Correa, Juan, Vendramin, Giovanni G., Plomion, Christophe, Majada, Juan, Alia, Ricardo, Eckert, Andrew J., Gonzalez-Martinez, Santiago C.

Publicada: 1 abr 2022
Resumen:
A decade of genetic association studies in multiple organisms suggests that most complex traits are polygenic; that is, they have a genetic architecture determined by numerous loci, each with small effect-size. Thus, determining the degree of polygenicity and its variation across traits, environments and time is crucial to understand the genetic basis of phenotypic variation. We applied multilocus approaches to estimate the degree of polygenicity of fitness-related traits in a long-lived plant (Pinus pinaster Ait., maritime pine) and to analyse this variation across environments and years. We evaluated five categories of fitness-related traits (survival, height, phenology, functional, and biotic-stress response) in a clonal common-garden network planted in contrasted environments (over 20,500 trees). Most of the analysed traits showed evidence of local adaptation based on Q(st)-F-st comparisons. We further observed a remarkably stable degree of polygenicity, averaging 6% (range of 0%-27%), across traits, environments and years. We detected evidence of negative selection, which could explain, at least partially, the high degree of polygenicity. Because polygenic adaptation can occur rapidly, our results suggest that current predictions on the capacity of natural forest tree populations to adapt to new environments should be revised, especially in the current context of climate change.

Filiaciones:
de Miguel, Marina:
 Univ Bordeaux, BIOGECO, INRAE, Cestas, France

 Univ Bordeaux, INRAE, Bordeaux Sci Agro, EGFV, Villenave Dornon, France

Rodriguez-Quilon, Isabel:
 INIA, Dept Forest Ecol & Genet, Forest Res Ctr, Madrid, Spain

Heuertz, Myriam:
 Univ Bordeaux, BIOGECO, INRAE, Cestas, France

Hurel, Agathe:
 Univ Bordeaux, BIOGECO, INRAE, Cestas, France

Grivet, Delphine:
 INIA, Dept Forest Ecol & Genet, Forest Res Ctr, Madrid, Spain

Pablo Jaramillo-Correa, Juan:
 Univ Nacl Autonoma Mexico, Inst Ecol, Dept Evolutionary Ecol, Mexico City, DF, Mexico

Vendramin, Giovanni G.:
 Inst Biosci & Bioresources, Natl Res Council, Div Florence, Sesto Fiorentino, Italy

Plomion, Christophe:
 Univ Bordeaux, BIOGECO, INRAE, Cestas, France

Majada, Juan:
 SERIDA, Secc Forestal, Grado, Spain

Alia, Ricardo:
 INIA, Dept Forest Ecol & Genet, Forest Res Ctr, Madrid, Spain

Eckert, Andrew J.:
 Virginia Commonwealth Univ, Dept Biol, Richmond, VA 23284 USA

Gonzalez-Martinez, Santiago C.:
 Univ Bordeaux, BIOGECO, INRAE, Cestas, France
ISSN: 09621083





MOLECULAR ECOLOGY
Editorial
Blackwell Publishing Ltd, 111 RIVER ST, HOBOKEN 07030-5774, NJ USA, Estados Unidos America
Tipo de documento: Article
Volumen: 31 Número: 7
Páginas: 2089-2105
WOS Id: 000755087000001
ID de PubMed: 35075727
imagen Green Submitted