Association Mapping for Fruit, Plant and Leaf Morphology Traits in Eggplant.
An eggplant (Solanum melongena) association panel of 191 accessions, comprising a mixture of breeding lines, old varieties and landrace selections was SNP genotyped and phenotyped for key breeding fruit and plant traits at two locations over two seasons. A genome-wide association (GWA) analysis was performed using the mixed linear model, which takes into account both a kinship matrix and the sub-population membership of the accessions. Overall, 194 phenotype/genotype associations were uncovered, relating to 30 of the 33 measured traits. These associations involved 79 SNP loci mapping to 39 distinct chromosomal regions distributed over all 12 eggplant chromosomes. A comparison of the map positions of these SNPs with those of loci derived from conventional linkage mapping showed that GWA analysis both validated many of the known controlling loci and detected a large number of new marker/trait associations. Exploiting established syntenic relationships between eggplant chromosomes and those of tomato and pepper recognized orthologous regions in ten eggplant chromosomes harbouring genes influencing breeders' traits.
Dipartimento di Scienze Agrarie, Forestali ed Alimentari (DISAFA)-Plant Genetics and Breeding, University of Torino, I-10095 Grugliasco, Torino, Italy.
Ezio
E
Portis
Dipartimento di Scienze Agrarie, Forestali ed Alimentari (DISAFA)-Plant Genetics and Breeding, University of Torino, I-10095 Grugliasco, Torino, Italy; Consiglio per la ricerca in agricoltura e l'analisi dell'economia agraria-CREA, Research Unit for Vegetable Crops, I-26836 Montanaso Lombardo, Lodi, Italy.
Fabio
F
Cericola
Dipartimento di Scienze Agrarie, Forestali ed Alimentari (DISAFA)-Plant Genetics and Breeding, University of Torino, I-10095 Grugliasco, Torino, Italy.
Lorenzo
L
Barchi
Consiglio per la ricerca in agricoltura e l'analisi dell'economia agraria-CREA, Research Unit for Vegetable Crops, I-26836 Montanaso Lombardo, Lodi, Italy.
Laura
L
Toppino
Consiglio per la ricerca in agricoltura e l'analisi dell'economia agraria-CREA, Research Unit for Vegetable Crops, I-63030 Monsampolo del Tronto, Ascoli Piceno, Italy.
Nazzareno
N
Acciarri
Consiglio per la ricerca in agricoltura e l'analisi dell'economia agraria-CREA, Research Unit for Vegetable Crops, I-63030 Monsampolo del Tronto, Ascoli Piceno, Italy.
Laura
L
Pulcini
Consiglio per la ricerca in agricoltura e l'analisi dell'economia agraria-CREA, Research Unit for Vegetable Crops, I-26836 Montanaso Lombardo, Lodi, Italy.
Tea
T
Sala
Dipartimento di Scienze Agrarie, Forestali ed Alimentari (DISAFA)-Plant Genetics and Breeding, University of Torino, I-10095 Grugliasco, Torino, Italy.
Sergio
S
Lanteri
Consiglio per la ricerca in agricoltura e l'analisi dell'economia agraria-CREA, Research Unit for Vegetable Crops, I-26836 Montanaso Lombardo, Lodi, Italy.
Giuseppe Leonardo
GL
Rotino
D001947:Breeding; D002874:Chromosome Mapping; D005638:Fruit / Q000235:genetics*; D023281:Genomics; D010641:Phenotype; D018515:Plant Leaves / Q000235:genetics*; D020641:Polymorphism, Single Nucleotide; D032323:Solanum melongena / Q000235:genetics*; D026801:Synteny