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Theoretical and Applied Genetics

, Volume 99, Issue 7–8, pp 1207–1215 | Cite as

Genetic mapping of monoterpene composition in an interspecific eucalypt hybrid

  • M. Shepherd
  • J. X. Chaparro
  • R. Teasdale
Original paper

Abstract 

Genetic control of foliar oil composition was investigated amongst half-sib progeny of an interspecific eucalypt hybrid. The oil was found to be largely composed of the monoterpenes, limonene, α−pinene, γ−terpinene, 1,8 cineole and p-cymene. Due to difficulties in the interpretation of the compositional data based on raw proportions, further analysis was conducted using log-ratio variables. A high degree of intercorrelation amongst log-ratios was thought to be a consequence of commonality in the biosynthetic origins of the monoterpenes. Quantitative trait locus (QTL) analysis of log-ratio variables indicated that a significant (68–81%) proportion of the variation in four out of the ten possible log-ratios were controlled by a single genomic region of the maternal Eucalyptusgrandis parent. The impact of this genomic region upon oil composition was thought to be a consequence of a gene, or genes, controlling the production of limonene, as limonene was the predominant oil constituent in many hybrid individuals and was common to all log-ratios associated with the identified genomic region.

Key words Monoterpenes quantitative trait loci analysis Eucalyptus intercorrelated variables 

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Copyright information

© Springer-Verlag Berlin Heidelberg 1999

Authors and Affiliations

  • M. Shepherd
    • 1
  • J. X. Chaparro
    • 1
  • R. Teasdale
    • 1
  1. 1.Forbio Inc., 52 Douglas St, Milton, Brisbane, Queensland 4064, PO Box 2256, Milton BC 4064, AustraliaAU

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