Evaluation of fruit physico-chemical characteristics of new mandarins - Noushin (Citrus reticulata cv. Noushin) and Shahin (Citrus reticulata cv. Shahin) - during different harvesting time

According to a breeding program carry out in Citrus and Subtropical Fruits Research Center (Ramsar), ‘Noushin’ and ‘Shahin’ mandarins were created from crossing between Clemantin mandarin×Salustiana orange and Clemantin mandarin×Hamlin orange, respectively. The fruits of this new varieties on Sour orange rootstock did not study yet, completely. Therefore, the aim of this study was to investigate the Noushin and Shahin physico-chemical characteristics on Sour orange rootstock during two years.
‘Noushin’ sampled from October to December during three months. ‘Shahin’ fruits were collected from October to February (5 times) as monthly. Various physico-chemical characteristics evaluated including fruit lenght, width, thickness; arithmetic, geometric, equivalent and harmonic diametrics means; aspect ratio, sphericity, surface area, true volume, apparent volume, volume error, density, peel thickness, Easy of peeling, weight, juice percentage, seed number, peel color indices (L*, a*, b*, hue angle, chroma and CCI), total soluble solid (TSS), titratable acidity (TA), technological index (TI) during experiment.
The results showed that fruit size, arithmetic, geometric, equivalent and harmonic means of both varieties had not significantly (p According to TSS:TA ratio index, ‘Noushin’ as an early ripening variety can harvested in the last October and ‘Shahin’ as mid ripening variety can harvested in late of December. Both of varieties is sutaible for the north of Iran climate. Based on juice percentage and TI data, the amount of juice with about 50% was higher in ‘Shahin’ that sutaible for prosessing industries. Due to empty space inside the fruit skin and flesh of ‘Noushin’ and low dansity (