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High-density linkage map construction and identification of loci regulating fruit quality traits in blueberry

Horticulture Research 2021年第1期8卷 2391-2403页

作者： Molla F.Mengist Hamed Bostan elisheba young Kristine L.Kay Nicholas Gillitt James Ballington Colin D.Kay Mario G.Ferruzzi Hamid Ashrafi Mary Ann Lila Massimo Iorizzo Plants for Human Health Institute North Carolina State UniversityKannapolisNCUSA Department of Horticultural Science North Carolina State UniversityRaleighNCUSA David H.Murdock Research Institute KannapolisNCUSA Department of Food Bioprocessing and Nutrition Sciences North Carolina State UniversityRaleighNCUSA

Fruit quality traits play a significant role in consumer preferences and consumption in blueberry(Vaccinium corymbosum L).The objectives of this study were to construct a high-density linkage map and to identify the underlying genetic basis of fruit quality traits in blueberry.A total of 287 F_(1) individuals derived from a cross between two southern highbush blueberry cultivars,‘Reveille’and‘Arlen’,were phenotyped over three years(2016–2018)for fruit quality-related traits,including titratable acidity,pH,total soluble solids,and fruit weight.A high-density linkage map was constructed using 17k single nucleotide polymorphisms *** linkage map spanned a total of 1397 cM with an average inter-loci distance of 0.08 *** quantitative trait loci interval mapping based on the hidden Markov model identified 18 loci for fruit quality traits,including seven loci for fruit weight,three loci for titratable acidity,five loci for pH,and three loci for total soluble *** of these loci were detected in more than one *** loci explained phenotypic variance ranging from 7 to 28% for titratable acidity and total soluble solid,and 8-13% for ***,the loci identified for fruit weight did not explain more than 10%of the phenotypic *** also reported the association between fruit quality traits and metabolites detected by Proton nuclear magnetic resonance analysis directly responsible for these fruit quality *** acids,citric acid,and quinic acid were significantly(P<0.05)and positively correlated with titratable *** molecules showed a strong and positive correlation with total soluble ***,the study dissected the genetic basis of fruit quality traits and established an association between these fruit quality traits and metabolites.

关键词： cultivar linkage traits

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