不同授粉品种对湖北利川新高梨花粉直感效应及果实品质的影响OA

The'Niitaka'cultivar of Pyrus pyrifolia has a large cultivation scale in Lichuan of Hubei Province.Additionally,pear exhibits the trait of gametophytic self-incompatibility(GSI).In production,it is essential to deploy suitable pollination trees or conduct artificial pollination to ensure the yield and quality of pears.To investigate the effects of different pollination varieties on the xenia effect of'Niitaka'pear,artificial pollination was performed using'Niitaka'pear as the female parent and pollen from four varieties('Xiangnan','Huanghua','Cuiguan',and'Wonhwang')as the male parents.Determinations were conducted for the following parameters:fruit set rate,external fruit quality(single fruit weight,transverse diameter,longitudinal diameter,fruit shape index),internal fruit quality(moisture content,stone cell content,fruit firmness,soluble solids content,total acid content,soluble solids-acid ratio),and organic acid composition.Furthermore,based on principal component analysis(PCA),the fruit quality was comprehensively evaluated to screen out suitable pollination varieties for'Niitaka'pear in the alpine region of Lichuan.The results indicated that'Niitaka'pear exhibited a significant xenia effect.Different pollination varieties showed no significant difference in their effects on fruit set rate.However,they had significant impacts on single fruit weight and fruit size(transverse diameter,longitudinal diameter).The pollination combination'Niitaka'×'Xiangnan'had the largest single fruit weight(353.3 g),as well as the highest transverse diameter(88.0 mm)and longitudinal diameter(76.3 mm).In terms of internal quality,the pollination combination'Niitaka'×'Xiangnan'resulted in the highest soluble solids content(11.0％),the pollination combination'Niitaka'×'Cuiguan'had the lowest stone cell content(0.317％)and the highest soluble solids-acid ratio(25.87),the pollination combination'Niitaka'×'Wonhwang'led to the highest fruit firmness(947.2 g/cm2),but the lowest soluble solids content(9.8％).Different pollination varieties significantly altered the proportion of organic acid composition in the fruits.The ranking of comprehensive scores from PCA was'Cuiguan'＞'Xiangnan'＞'Huanghua'＞'Wonhwang'.Considering all indicators comprehensively,to improve the comprehensive fruit quality of'Niitaka'pear,it is recommended to prioritize'Cuiguan'as the pollination variety in the alpine region of Lichuan.