Multivariate Analysis and Selection Indices to Identify Superior Quince Cultivars for Cultivation in the Tropics

Abstract

<jats:p>Among the fruit species cultivated in subtropical climates, quince has productive cultivars with high horticultural potential. The objectives of this study were to evaluate the genetic divergence among quince cultivars through multivariate procedures and to identify cultivars for cultivation in the tropics through selection indices. Twenty-seven productive quince cultivars were grown in a location with a high-altitude tropical climate. The number of fruit, estimated yield, flowering period, number of buds, number of shoots, number of brindles per shoot, shoot length, average fruit weight, fruit length, and fruit diameter were measured. A multivariate principal component analysis (PCA) associated with the unweighted pair group method with arithmetic means (UPGMA) based on Gower distance and Pearson correlation coefficients was used to evaluate genetic divergence. Superior cultivars were defined by the selection index based on the rank summation index and the Z-index. UPGMA grouping indicated there was genetic variability among cultivars and showed that groups that were more dissimilar [e.g., the cultivars Bereckzy and Champion (distance = 0.69)] had the potential to be used in future stages of quince selection. The estimated yield, shoot length, fruit weight and diameter, and flowering period contributed to the maximum variability among quince cultivars. The selection indices identified cvs. Bereckzy, Alaranjado, and Alongado (30, 68, and 73 rank summation index, respectively) as superior, simultaneously considering the evaluated traits with greater potential for cultivation in the tropics.</jats:p>

Genomic regions associated with tuber traits in tetraploid potatoes and identification of superior clones for breeding purposes

“…The best index to use depends on the market needs and the objectives of the breeding program. Generating Z-indexes (Mendes et al, 2009;standardized/normalized) alternative to identify superior lines in common bean (Lima et al, 2015), upland rice (Ribeiro et al, 2016), and quince cultivars (Coutinho et al, 2019). The incorporation of genomic selection into applied breeding programs in potato appears to be very promising.…”

Bioactive compounds and antioxidant activity of fruit of temperate climate produced in subtropical regions

“…The cultivars used in this work were: peach: Aurora, Biuti, Bonão, Centenário, Diamante, Douradão, Libra, Régis, and Tropical; quince: Fuller, Smyruna, Portugal, Provence, Mendonza Inta-37, Alaranjado, Lageado, CTS 207, Dangers, and Bereczy; pear: Tenra, Centenária, Cascatence, Primorosa and Seleta; fig: Roxo de Valinhos, Mini Figo, Troiano, Três num Prato, Bêbara Branca, Lemon, Brunswick, and Pingo de Mel. These cultivars were chosen because they adapt to subtropical conditions (Bisi et al, 2016;Bisi et al, 2019;Coutinho et al, 2019;Tadeu et al, 2019).…”

“…The cultivation of temperate fruit trees has increased substantially, specifically in regions with a mild winter, due to the adaptability of cultivars, and results show that the production in these areas present high productivity when compared to traditionally producing temperate regions (Pio et al, 2019). Peach, pear, quince and fig trees are species that have selected cultivars with high performance in subtropical regions (Bisi et al, 2016;Bisi et al, 2019;Coutinho et al, 2019;Tadeu et al, 2019) The peach tree (Prunus persica (L.) Batsch) produces fruit with a very pleasant aroma and color that fits the list of economically important fruits, not only because of its exotic appearance, but also because it is an excellent source of bioactive compounds, (Cantín et al, 2009) like phenolic compounds (35.97 mg/100 g) and carotenoids (μg/100 g) (Legua et al, 2011). Peach is very much appreciated, mainly for having organoleptic characteristics, due to this the growing consumption of this fruit is evident (Instituto Brasileiro de Geografia e Estatística, 2020).…”

A Novel Crop Shortlisting Method for Sustainable Agricultural Diversification across Italy

“…In RSI, ranks of the individual or subcategories were summed and ranked again based on the sum of ranks. The RSI is an established method that has been used in several food and other agriculturalrelated rankings and selection of cultivars/genotypes [31][32][33][34][35].…”