Pedro Soraia I, Coelho Elisabete, Peres Fátima, Machado Ana, Rodrigues António M, Wessel Dulcineia F, Coimbra Manuel A, Anjos Ofélia
IPCB, Instituto Politécnico de Castelo Branco, 6001-909 Castelo Branco, Portugal.
CEF, Centro de Estudos Florestais, Instituto Superior de Agronomia, Universidade de Lisboa, 1349-017 Lisbon, Portugal.
Foods. 2020 Sep 1;9(9):1209. doi: 10.3390/foods9091209.
"Pera Rocha do Oeste" is a pear ( L.) variety native from Portugal with a Protected Designation of Origin (PDO). To supply the world market for almost all the year, the fruits are kept under controlled storage. This study aims to identify which classical physicochemical parameters (colour, total soluble solids (TSS), pH, acidity, ripening index, firmness, vitamin C, total phenols, protein, lipids, fibre, ash, other compounds including carbohydrates, and energy) could be fingerprint markers of PDO "Pera Rocha do Oeste". For this purpose, a data set constituting fruits from the same size, harvested from three orchards of the most representative PDO locations and stored in refrigerated conditions for 2 or 5 months at atmospheric conditions or for 5 months under a modified atmosphere, were selected. To validate the fingerprint parameters selected with the first set, an external data set was used with pears from five PDO orchards stored under different refrigerated conditions. Near infrared (NIR) spectroscopy was used as a complementary tool to assess the global variability of the samples. The lightness of the pulp; the b* CIELab coordinate of the pulp and peel; and the pulp TSS, pH, firmness, and total phenols, due to their lower variability, are proposed as fingerprint markers of this pear.
“佩拉·罗查·多·奥este”是一种原产于葡萄牙的梨（L.）品种，拥有受保护的原产地名称（PDO）。为了几乎全年供应全球市场，果实被保存在可控的储存条件下。本研究旨在确定哪些经典的理化参数（颜色、总可溶性固形物（TSS）、pH值、酸度、成熟指数、硬度、维生素C、总酚、蛋白质、脂质、纤维、灰分、包括碳水化合物在内的其他化合物以及能量）可以作为PDO“佩拉·罗查·多·奥este”的指纹标记。为此，选取了一个数据集，该数据集由来自最具代表性的PDO产地的三个果园、大小相同的果实组成，在大气条件下冷藏2或5个月，或在气调条件下冷藏5个月。为了验证用第一组数据所选的指纹参数，使用了一个外部数据集，该数据集包含来自五个PDO果园、保存在不同冷藏条件下的梨。近红外（NIR）光谱被用作一种补充工具，以评估样品的整体变异性。果肉的亮度；果肉和果皮的b* CIELab坐标；以及果肉的TSS、pH值、硬度和总酚，由于其变异性较低，被提议作为这种梨的指纹标记。
