Profiling fruit volatiles in the progeny of a 'Royal Gala' x 'Granny Smith' apple (Malus x domestica) cross.
Volatile flavor compounds from the fruit of the progeny of two apple (Malus x domestica) cultivars with distinctive flavor and volatile profiles, 'Royal Gala' and 'Granny Smith', were measured by headspace gas chromatography-mass spectrometry over two fruiting seasons. Principal component analysis separated the volatile profiles into two groups according to the amounts produced of butyl, 2-methybutyl, pentyl, and hexyl acetates and of ethyl butanoate, butanol, 2-methylbutanol, and hexanol. Fruit containing the four acetate esters clustered with the 'Royal Gala' parent and were scored more similar to 'Royal Gala' than to "Granny Smith' in flavor. Fruit clustering with the 'Granny Smith' parent contained higher levels of ethyl butanoate and alcohols. Levels of acetate esters correlated to levels of their alcohol precursors, and control of this trait segregated in Mendelian fashion. The locus was mapped to the top of 'Royal Gala' linkage group 2 close to the Rvi4 (Vh4) locus for resistance to Venturia inaequalis , the causal agent of apple scab.
Rowan
Daryl D
DD
The New Zealand Institute for Plant and Food Research, Private Bag 11600, Palmerston North 4442, New Zealand. drowan@pfr.co.nz
Hunt
Martin B
MB
Dimouro
Aurélie
A
Alspach
Peter A
PA
Weskett
Rosemary
R
Volz
Richard K
RK
Gardiner
Susan E
SE
Chagné
David
D
D002874:Chromosome Mapping; D003433:Crosses, Genetic; D005638:Fruit / Q000737:chemistry* / Q000235:genetics*; D008401:Gas Chromatography-Mass Spectrometry; D027845:Malus / Q000235:genetics*; D013045:Species Specificity; D013649:Taste; D055549:Volatile Organic Compounds / Q000032:analysis*
D055549:Volatile Organic Compounds