Duchêne Eric, Butterlin Gisèle, Claudel Patricia, Dumas Vincent, Jaegli Nathalie, Merdinoglu Didier
INRA, UMR 1131 Santé de la Vigne et Qualité du Vin, 28, rue de Herrlisheim, BP 20507, 68021, Colmar, France.
Theor Appl Genet. 2009 Feb;118(3):541-52. doi: 10.1007/s00122-008-0919-8. Epub 2008 Nov 11.
Linalool, geraniol, nerol, citronellol and alpha-terpineol are isoprenoid molecules responsible for specific aromas found in grapes and wines. Total concentrations (free and bound forms) of these compounds were measured in the skins of mature berries during 2 successive years in two progenies obtained from Muscat Ottonel and Gewurztraminer selfings. Partial genetic maps based on microsatellite markers were constructed and several quantitative trait loci (QTLs) related to terpenol content were detected. A major QTL on linkage group (LG) 5 colocated with a deoxy-D: -xylulose synthase gene, coding for the first enzyme of the plastidial isoprenoid biosynthesis pathway. The number of favourable alleles at this locus determined the level of terpenol synthesis. A second QTL, on LG 10, was found to determine the balance linalool versus geraniol and nerol in the Muscat self-progeny plants.
芳樟醇、香叶醇、橙花醇、香茅醇和α-萜品醇都是类异戊二烯分子，它们赋予葡萄和葡萄酒特定的香气。在连续两年中，对奥托奈麝香葡萄和琼瑶浆自交获得的两个后代成熟浆果的果皮中这些化合物的总浓度（游离形式和结合形式）进行了测量。构建了基于微卫星标记的部分遗传图谱，并检测到了几个与萜烯醇含量相关的数量性状位点（QTL）。连锁群（LG）5上的一个主要QTL与一个脱氧-D-木酮糖合酶基因共定位，该基因编码质体类异戊二烯生物合成途径的第一种酶。该位点上有利等位基因的数量决定了萜烯醇的合成水平。在LG 10上发现了第二个QTL，它决定了麝香葡萄自交后代植株中芳樟醇与香叶醇和橙花醇的平衡。
