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Pachycladon

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Wild Crop Relatives: Genomic and Breeding Resources

Abstract

The genus Pachycladon belongs to the Brassicaceae family and is comprised of species endemic to the South Pacific, specifically the South Island of New Zealand and Tasmania. The species in this genus are the product of a Pleistocene intertribal allopolyploidization event followed by rapid adaptive radiation and have been the focus of intense phylogenetic, phylogeographic, molecular ecological, and genetic work. Pachycladon is closely related to the model plant Arabidopsis thaliana and molecular tools developed for the latter have been successfully used to advance genetic studies of Pachycladon. A growing volume of molecular resources and protocols are being developed for Pachycladon, currently the subject of QTL mapping, transcriptome analysis through microarray studies and high-throughput short-read sequencing, genetic transformation, and interspecific and intergeneric hybridization studies. Pachycladon is emerging as a useful model genus to help elucidate the genetic basis of traits that are of interest across the Brassicaceae, most notably those involved in plant speciation, adaptive radiation, and evolution.

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Notes

  1. 1.

    The taxonomic standing of this species is questionable as P. crenatus appears to grade into P. novae-zelandiae, with whom it shares many features. For the purpose of this chapter, therefore, a broad taxonomic concept of P. novae-zelandiae will be adopted that includes P. crenatus.

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Acknowledgments

We, the authors, gratefully acknowledge the contribution of Peter Lockhart (AWC, Massey University, NZ) for his guidance and leadership in the establishment and development of the Pachycladon molecular and genomic research program. We wish to thank Vaughan Symonds (Massey University, NZ), Sue Sherman-Broyles and June Nasrallah (Cornell University, USA), and Raazesh Sainudiin (University of Canterbury, NZ) for suggestions to improve the manuscript; Kerry Ford (Fig. 14.1f), John Hunt (Fig. 14.1e), and Ewen Cameron (Fig. 14.1d) for permission to use photographs; Caroline Miller for technical assistance (Landcare Research); the New Zealand Marsden Fund and the Alexander von Humboldt Foundation for research funding.

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  1. School of Biological Sciences, University of Canterbury, Private Bag 4800, Christchurch, 8140, New Zealand

    Krithika Yogeeswaran

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  1. Krithika Yogeeswaran
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Correspondence to Krithika Yogeeswaran .

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  1. Institute of Nutraceutical Research, Clemson University, Jordan Hall 109, Clemson, 29634, South Carolina, USA

    Chittaranjan Kole

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Yogeeswaran, K., Voelckel, C., Joly, S., Heenan, P.B. (2011). Pachycladon. In: Kole, C. (eds) Wild Crop Relatives: Genomic and Breeding Resources. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-14871-2_14

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