Genetic dissection of fruit weight and size in an F2 peach (Prunus persica (L.) Batsch) progeny

Abstract

Artículo de publicación ISIFruit 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

Mapping QTLs associated with fruit quality traits in peach [Prunus persica (L.) Batsch] using SNP maps

“…SNPs allow increased saturation and genome coverage and therefore provide higher precision and accuracy for QTL dissection in this population, as was found in other Prunus progenies Martínez-García et al 2013b;Da Silva-Linge et al 2015).…”

“…To our knowledge, this is the sixth full map produced with the 'IPSC 9K peach SNP array v1' in peach, although others have been constructed with this array technology in other Prunus-derived progenies Yang et al 2013;Martínez-García et al 2013a;Frett et al 2014;Pacheco et al 2014;Romeu et al 2014;Da Silva-Linge et al 2015;Nuñez-Lillo et al 2015). The length of genetic linkage maps mostly based on SNP markers were more saturated compared with the previously published maps, with the exception of the T × E Prunus reference map (Dirlewanger et al 2006).…”

Nutrients of Cubiu Fruits (<i>Solanum sessiliflorum</i> Dunal, Solanaceae) as a Function of Tissues and Ripening Stages

“…Multifactorial inheritance is defined as traits resulting from the interplay of multiple environmental factors (e.g., pedoclimatic factors) with multiple genes (or polygenes) [43,44,45,46]. Fruit weight is a quantitative trait influenced by the combined action of polygenes and environmental factors [44,46,47].…”

“…Fruit weight is a quantitative trait influenced by the combined action of polygenes and environmental factors [44,46,47]. Large edible fruits such as cubiu result from selection, domestication, and long breeding practices for desirable traits (e.g., higher weight) [1].…”

“…QTL associated with fruit weight has aroused great interest in different breeding programs [44]. QTL may also advance understanding of phenotypic variations in cubiu fruits.…”