Artículo de revista
Genetic dissection of fruit weight and size in an F2 peach (Prunus persica (L.) Batsch) progeny
Fecha
2015Registro en:
Mol Breeding (2015) 35:71
DOI: 10.1007/s11032-015-0271-z
Autor
Silva Linge, Cássia da
Bassi, Daniele
Bianco, Luca
Pacheco Blanco, Igor
Pirona, Raul
Rossini, Laura
Institución
Resumen
Fruit weight is a quantitative trait influenced
by the combined action of several genes and
environmental factors. Knowledge of the quantitative
trait loci (QTLs) associated with fruit weight and size
is a priority to support breeding programmes in peach
(Prunus persica (L.) Batsch) because of commercial
interest in larger fruits. To this end, we built a genetic
map of an F2 progeny of 117 individuals from the cross
PI91459 (‘NJ Weeping’) 9 ‘Bounty’ using a single
nucleotide polymorphism (SNP) genotyping array for
peach (9K SNP array v1). Data for fruit weight, height,
width, and depth were recorded for the progeny and
both parents over 2 years (2011, 2012). Correlations
between the traits fruit weight and size were positive
and significant for both years. A SNP map was
constructed comprising 1,148 markers distributed
over eight linkage groups. The map spans 536.6 cM
with an average distance between markers of 0.52 cM,
covering 93.6 % of the physical length of the peach
genome, thus representing an ideal basis for QTL
mapping. QTL analysis led to the identification of a
total of 28 QTLs for the considered traits, eleven of
which remained stable in both years. We also observed
clusters of QTLs, some of which were mapped for the
first time, while others correspond to loci previously
identified in different progenies and following different
approaches.