花粉直感对'新梨7号'果实品质的影响OA

[Objective]This research aimed to explore the effect of pollen xenia on fruit quality of'Xinli No.7',to provide theoretical reference for scientific configuration of pollination varieties.[Method]With the 26-year-old'Xinli No.7'as the female parent,pollen from seven pear varieties including'KELX','ZS','QY','AGS','WX','DS'and'GQ'were collected for artificial pollination.The effects of pollen xenia on the appearance quality and internal quality of'Xinli No.7'fruit were analyzed with natural pollination as the control,and the fruit quality was comprehensively evaluated by cluster analysis and principal compo-nent analysis.[Result]The fruit quality traits of'Xinli No.7'showed obvious pollen xenia effect.The fruit setting rate of different pollination combinations ranged between 29.41％-93.04％,among which the fruit setting rate of'QY'pollination combination was the highest(93.04％),and the fruit setting rate of'KELX'pollination was the lowest(53.82％)except for the control.After pollination,the fruit shape of'Xinli No.7'was obovate,round or spindle,which was significantly different from that of the control.In terms of fruit appearance,except for the control and'KELX'pollinated fruit,which were free from fur-rows,the fruit showed furrows after pollination with other varieties.The fruit stem posture of'GQ','ZS','QY'and'AGS'after pollination was oblique,which was significantly different from that of the control.The sepal of'KELX'and'WX'pollinated fruit showed a polymerization posture,and the sepal of'AGS'pollinated fruit showed an open posture,which was significantly different from that of the control.The sepals of'WX'and'QY'pollinated fruits survived,which were significantly different from the re-maining sepals of the control.The fruit spot density of'KELX'was the highest,which was 33.00 num-ber/cm2,and the fruit spot density of'WX'was the least,which was 18.67 number/cm2.In terms of fruit size,the single fruit weight of'KELX'pollinated fruit was significantly reduced,and the vertical and hori-zontal diameters of'ZS','WX'and'DS'pollinated fruits were higher than those of the control.The fruit stem of'ZS'pollinated fruit was the shortest and the thickness was the smallest,which was significantly different from that of the control.The fruit stem of'DS'pollinated fruit was the longest,which was 24.15 mm.The fruit core diameter of'WX'pollinated fruit was the largest,reaching 37.36 mm,and the fruit core diameter of'KELX'pollinated fruit was the smallest,reaching 34.06 mm.The fruit core position of'WX'and'AGS'was in the middle after pollination,which was significantly different from that of the control near the calyx end.Except for the pollination combination of'QY',the seed of other combinations were all narrow oval shape,which were significantly different from the oval shape of the control.In terms of fruit color and flesh texture,the peel background color of'QY'and'GQ'pollinated fruits was green,which was different from that of the control,and the flesh texture of'GQ','ZS','QY'and'AGS'was crisp after pollination,which was significantly different from that of the control.In terms of fruit nutrition-al quality,the'AGS'pollinated fruits had the lowest vitamin C content after pollination,only 0.15 mg/g,and the soluble solids and stone cell contents of'WX'pollinated fruits were the highest(13.00％and 0.06％,respectively),which were significantly different from the control.According to the cluster analy-sis,the pollination combinations were divided into 4 categories.The'QY','GQ','ZS'pollination combi-nations and the control were clustered into the first category,'KELX'pollination combination was clus-tered into the second category,'WX'and'DS'pollination combinations were clustered into the third cate-gory,and'AGS'pollination combination was clustered into the fourth category alone.The comprehensive evaluation of fruit quality by principal component analysis showed that the fruit quality of'WX','DS','QY'and'AGS'was better than that of the control after pollination.[Conclusion]Pollination of different varieties had a significant effect on the fruit appearance and internal quality of'Xinli No.7',and significant xenia effect can be observed.After comprehensive consideration of flowering period and stone cell content in pulp,it was consi-dered that'AGS'was suitable for pollination of'Xinli No.7'.