Dataset for sample size for postharvest quality traits of ‘Palmer’ mangoes

The objective of this study was to determine the most efficient sample size required to estimate the mean of postharvest quality traits of ‘Palmer’ mangoes harvested in two growing seasons. A total of 50 mangoes were harvested at maturity stage 2, in winter (June 2020) and spring (October 2020), and evaluated for weight, length, ventral and transverse diameter, skin and pulp L*, C* and hº, dry matter, firmness, soluble solids (SS), titratable acidity (TA) and the SS/TA ratio. Raw data and estimation of sample size for each quality trait in each growing season are attached. According to the results, the coefficient of variation (CV) of fruit quality traits ranged from 2.1% to 18.1%. The highest CV in both harvests was observed for the SS/TA ratio, while the lowest was reported for pulp hº. In order to estimate the mean of physicochemical traits of ‘Palmer’ mangoes, 12 fruits are needed in the winter and 14 in the spring, considering an estimation error of 10% and a confidence interval of 95%. TA and the SS/TA ratio required the highest sample size, while L* and hº required the lowest sample size. In conclusion, the variability was different among physicochemical traits and seasons, implying that different sample sizes are required to estimate the mean of different quality traits in different growing seasons.

本研究旨在确定估算两个生长季采收的‘Palmer’芒果采后品质性状均值所需的最优样本量。本研究于2020年冬季（2020年6月）与春季（2020年10月）的成熟度2期共采收50个芒果，对其重量、长度、腹径与横径、果皮和果肉的L*、C*及hº、干物质含量、硬度、可溶性固形物（SS）、可滴定酸度（TA）以及SS/TA比值进行了测定。本研究附有为每个生长季各品质性状计算的原始数据与样本量估算结果。结果显示，果实品质性状的变异系数（CV）介于2.1%至18.1%之间。两次采收中变异系数最高的均为SS/TA比值，最低的则为果肉hº。当设定估计误差为10%、置信区间为95%时，估算‘Palmer’芒果理化性状均值所需的样本量为冬季12个果实，春季14个果实。其中TA与SS/TA比值所需样本量最高，而L*和hº所需样本量最低。综上，不同理化性状与生长季的变异程度存在差异，这意味着在不同生长季估算不同品质性状的均值时，需要采用不同的样本量。