Karyotype diversity and the origin of grapefruit

Grapefruit is a group of citrus of recent origin, probably resulting from a cross between pummelo and sweet-orange

Ana Paula de Moraes

2007

Key concepts

Scholarcy highlights

  • Grapefruit is a group of citrus of recent origin, probably resulting from a cross between pummelo and sweet-orange
  • From each pummelo chromosome pair one chromosome seems to be present in grapefruit karyotypes
  • The different grapefruit karyotypes might result from independent crosses between pummelos of different karyotypic constitution and sweet-oranges
  • The chromosome markers found in the tangelo ‘Orlando’ and the position of their two 45S rDNA confirm the grapefruit ‘Duncan’ and the tangerine ‘Dancy’ as their parents

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