This paper presents a cytological study of two recently described species of Ophrys from the Apulia region, which is one of the most important diversification centres of the genus. The basic chromosome number was x ¼ 18 for the two species. Ophrys peucetiae Lozito, D’Emerico, Medagli & Turco has the karyotype 2n ¼ 2x ¼ 36: 24m þ 12 sm, and O. pseudomelena Turco, Medagli & D’Emerico has 2n ¼ 2x ¼ 36: 30m þ 6 sm. As observed in the O. fusca group, in O. pseudomelena, metacentric chromosomes predominate over submetacentric ones. In contrast, Ophrys peucetiae has a more evolved character, as seen in the standard karyotype of O. fuciflora s.l. On average, Ophrys peucetiae exhibited a more asymmetrical karyotype than O. pseudomelena. Variations in morphology and size in chromosome pair 1 were observed within both species.
A cytological study onOphrys(Orchidaceae) in Italy: New evidence and the importance of polyploidy
TURCO, ALESSIO;MEDAGLI, Pietro;ALBANO, Antonella
2015-01-01
Abstract
This paper presents a cytological study of two recently described species of Ophrys from the Apulia region, which is one of the most important diversification centres of the genus. The basic chromosome number was x ¼ 18 for the two species. Ophrys peucetiae Lozito, D’Emerico, Medagli & Turco has the karyotype 2n ¼ 2x ¼ 36: 24m þ 12 sm, and O. pseudomelena Turco, Medagli & D’Emerico has 2n ¼ 2x ¼ 36: 30m þ 6 sm. As observed in the O. fusca group, in O. pseudomelena, metacentric chromosomes predominate over submetacentric ones. In contrast, Ophrys peucetiae has a more evolved character, as seen in the standard karyotype of O. fuciflora s.l. On average, Ophrys peucetiae exhibited a more asymmetrical karyotype than O. pseudomelena. Variations in morphology and size in chromosome pair 1 were observed within both species.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
