Genomic approaches to selection in outcrossing perennials: focus on essential oil crops

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• 作者：David Kainer ; Robert Lanfear ; William J. Foley…
• 刊名：Theoretical and Applied Genetics
• 出版年：2015
• 出版时间：December 2015
• 年：2015
• 卷：128
• 期：12
• 页码：2351-2365
• 全文大小：992 KB
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• 作者单位：David Kainer (1)
  Robert Lanfear (2)
  William J. Foley (1)
  Carsten Külheim (1)
  
  1. Research School of Biology, The Australian National University, Canberra, ACT, 2601, Australia
  2. Department of Biological Sciences, Macquarie University, Sydney, NSW, 2109, Australia
  
• 刊物主题：Plant Breeding/Biotechnology; Plant Genetics & Genomics; Agriculture; Plant Biochemistry; Biochemistry, general; Biotechnology;
• 出版者：Springer Berlin Heidelberg
• ISSN：1432-2242

文摘

The yield of essential oil in commercially harvested perennial species (e.g. ‘Oil Mallee-eucalypts, Tea Trees and Hop) is dependent on complex quantitative traits such as foliar oil concentration, biomass and adaptability. These often show large natural variation and some are highly heritable, which has enabled significant gains in oil yield via traditional phenotypic recurrent selection. Analysis of transcript abundance and allelic diversity has revealed that essential oil yield is likely to be controlled by large numbers of quantitative trait loci that range from a few of medium/large effect to many of small effect. Molecular breeding techniques that exploit this information could increase gains per unit time and address complications of traditional breeding such as genetic correlations between key traits and the lower heritability of biomass. Genomic selection (GS) is a technique that uses the information from markers genotyped across the whole genome in order to predict the phenotype of progeny well before they reach maturity, allowing selection at an earlier age. In this review, we investigate the feasibility of genomic selection (GS) for the improvement of essential oil yield. We explore the challenges facing breeders selecting for oil yield, and how GS might deal with them. We then assess the factors that affect the accuracy of genomic estimated breeding values, such as linkage disequilibrium (LD), heritability, relatedness and the genetic architecture of desirable traits. We conclude that GS has the potential to significantly improve the efficiency of selection for essential oil yield. Communicated by R. K. Varshney.