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Genus-wide sequencing supports a two-locus model for sex-determination in Phoenix

Author

Listed:
  • Maria F. Torres

    (Weill Cornell Medicine-Qatar
    University of Cincinnati)

  • Lisa S. Mathew

    (Weill Cornell Medicine-Qatar)

  • Ikhlak Ahmed

    (Weill Cornell Medicine-Qatar)

  • Iman K. Al-Azwani

    (Weill Cornell Medicine-Qatar)

  • Robert Krueger

    (USDA-ARS National Clonal Germplasm Repository for Citrus & Dates)

  • Diego Rivera-Nuñez

    (University of Murcia)

  • Yasmin A. Mohamoud

    (Weill Cornell Medicine-Qatar)

  • Andrew G. Clark

    (Cornell University)

  • Karsten Suhre

    (Weill Cornell Medicine-Qatar)

  • Joel A. Malek

    (Weill Cornell Medicine-Qatar
    Weill Cornell Medicine-Qatar)

Abstract

The date palm tree is a commercially important member of the genus Phoenix whose 14 species are dioecious with separate male and female individuals. To identify sex determining genes we sequenced the genomes of 15 female and 13 male Phoenix trees representing all 14 species. We identified male-specific sequences and extended them using phased single-molecule sequencing or BAC clones. We observed that only four genes contained sequences conserved in all analyzed Phoenix males. Most of these sequences showed similarity to a single genomic locus in the closely related monoecious oil palm. CYP703 and GPAT3, two single copy genes present in males and critical for male flower development in other monocots, were absent in females. A LOG-like gene appears translocated into the Y-linked region and is suggested to play a role in suppressing female flowers. Our data are consistent with a two-mutation model for the evolution of dioecy in Phoenix.

Suggested Citation

  • Maria F. Torres & Lisa S. Mathew & Ikhlak Ahmed & Iman K. Al-Azwani & Robert Krueger & Diego Rivera-Nuñez & Yasmin A. Mohamoud & Andrew G. Clark & Karsten Suhre & Joel A. Malek, 2018. "Genus-wide sequencing supports a two-locus model for sex-determination in Phoenix," Nature Communications, Nature, vol. 9(1), pages 1-9, December.
    • Handle: RePEc:nat:natcom:v:9:y:2018:i:1:d:10.1038_s41467-018-06375-y
    DOI: 10.1038/s41467-018-06375-y
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    Cited by:

    1. Alessandro Vannozzi & Fabio Palumbo & Margherita Lucchin & Gianni Barcaccia, 2022. "Dioecy in Flowering Plants: From the First Observations of Prospero Alpini in the XVI Century to the Most Recent Advances in the Genomics Era," Agriculture, MDPI, vol. 12(3), pages 1-10, March.

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