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Publication Details
AFRICAN RESEARCH NEXUS
SHINING A SPOTLIGHT ON AFRICAN RESEARCH
agricultural and biological sciences
Male-specific DNA markers provide genetic evidence of an XY chromosome system, a recombination arrest and allow the tracing of paternal lineages in date palm
New Phytologist, Volume 197, No. 2, Year 2013
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Description
Whether sex chromosomes are differentiated is an important aspect of our knowledge of dioecious plants, such as date palm (Phoenix dactylifera). In this crop plant, the female individuals produce dates, and are thus the more valuable sex. However, there is no way to identify the sex of date palm plants before reproductive age, and the sex-determining mechanism is still unclear. To identify sex-linked microsatellite markers, we surveyed a set of 52 male and 55 female genotypes representing the geographical diversity of the species. We found three genetically linked loci that are heterozygous only in males. Male-specific alleles allowed us to identify the gender in 100% of individuals. These results confirm the existence of an XY chromosomal system with a nonrecombining XY-like region in the date palm genome. The distribution of Y haplotypes in western and eastern haplogroups allowed us to trace two male ancestral paternal lineages that account for all known Y diversity in date palm. The very low diversity associated with Y haplotypes is consistent with clonal paternal transmission of a nonrecombining male-determining region. Our results establish the date palm as a biological model with one of the most ancient sex chromosomes in flowering plants. © 2012 IRD. New Phytologist © 2013 New Phytologist Trust.
Authors & Co-Authors
Chérif, Emira
France, Montpellier
Ird Centre de Montpellier
Tunisia, Tunis
Université de Tunis el Manar, Faculté Des Sciences de Tunis
Zehdi-Azouzi, Salwa
Tunisia, Tunis
Université de Tunis el Manar, Faculté Des Sciences de Tunis
Castillo, Karina
France, Montpellier
Ird Centre de Montpellier
Chabrillange, Nathalie
France, Montpellier
Ird Centre de Montpellier
Abdoulkader, Sabira
Djibouti, Route de L′aéroport
Cerd
Pintaud, Jean Christophe
France, Montpellier
Ird Centre de Montpellier
Santoni, Sylvain
France, Montpellier
Amélioration Génétique et Adaptation Des Plantes Méditerranéennes et Tropicales Agap
Salhi-Hannachi, Amel
Tunisia, Tunis
Université de Tunis el Manar, Faculté Des Sciences de Tunis
Glémin, Sylvain
France, Montpellier
Institut Des Sciences de L’evolution de Montpellier
Aberlenc-Bertossi, Frédérique
France, Montpellier
Ird Centre de Montpellier
Statistics
Citations: 89
Authors: 10
Affiliations: 5
Identifiers
Doi:
10.1111/nph.12069
ISSN:
0028646X
e-ISSN:
14698137
Research Areas
Genetics And Genomics
Sexual And Reproductive Health
Participants Gender
Male
Female