Phenotypic diversity and relationships of fruit quality traits in peach and nectarine [Prunus persica (L.) Batsch] breeding progenies

Abstract

Agronomic and fruit quality traits were evaluated and compared for three consecutive years on 1,111 seedlings coming from 15 peach and nectarine breeding crosses, grown under a Mediterranean climate. Significant differences among and within the different progenies were found for most of the traits analyzed. The breeding population segregated for several Mendelian characters such as peach or nectarine fruit, round or flat fruit, yellow or white flesh and freestone or clingstone. In addition, aborting fruit and flat fruit trees were found in our progeny, and our data seem to support multi-allelic control of both flat shape and aborting fruit. The variation within the progenies of some traits such as blooming and harvesting date, yield, fruit weight and SSC was continuous, suggesting a polygenic inheritance. Relationships between qualitative pomological traits and these agronomic and fruit quality parameters were also found. Valuable correlations among agronomic and fruit quality parameters were found, although coefficients of variation depending on the progeny should be considered. In addition, principal component analysis (PCA) revealed several relationships among quality traits in the evaluated progenies. Based on this evaluation, 26 outstanding genotypes were pre-selected from the initial breeding population for further studies.

Profiling diversity and comparison of Eastern and Western cultivars of Prunus persica based on phenotypic traits

“…In general, when fruits were harvested later, they were larger and had higher SSCs. This result is in agreement with previous reports (Dirlewanger et al 1999;Cantin et al 2010). When fruit ripens, carbohydrates are synthesized through photosynthesis and transported to the fruit.…”

“…In linkage group 5, there is a single dominant gene G, which determines nectarine or peach type (Dirlewanger et al 1998(Dirlewanger et al , 1999Bliss et al 2002). Consequently, there are several reports that the acidity of nectarine is higher than that of peaches (Cantin et al 2010;Font i Forcada et al 2014). In addition, the TA values of nectarines in this study were significantly higher than those of peaches.…”

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

“…Production (yield), fruit weight, flesh firmness, soluble solids concentration (SSC), pH, titratable acidity (TA) were evaluated for 3 years (2007,2009 and 2010); relative antioxidant capacity (RAC), and contents of vitamin C, total phenolic, flavonoids, anthocyanins, and individual sugars were evaluated for 4 years as previously reported (Cantín et al 2009b;2010b;Abidi et al 2011;. For production, all fruits from each tree were harvested and weighed (Kg/tree).…”

Pomological and Nutraceutical Properties in Apricot Fruit: Cultivation Systems and Cold Storage Fruit Management

“…In this context, principal component analysis (PCA) has been usefully employed for fruit characterization and germplasm evaluation of different fruit species like quince [32], peach and nectarine [33], and apricot [34] to study relationships among cultivars and correlations among fruit traits within each species.…”