| Pak. J. Bot., 38(1): 63-66, 2006. | Back to Contents | ||||
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HYBRIDIZATION IN ACACIA NILOTICA COMPLEX IN INDO-PAKISTAN SUBCONTINENT: CYTOLOGICAL EVIDENCE S. KHATOON AND S.I. ALI
Abstract: Acacia nilotica complex comprises 9 subspecies of which 5 occur
in Pakistan. Hybridization among subspecies is reported in some previous
works on the basis of morphological and chemical data. The present work
provides the first cytological evidence (disturbed meiosis) for hybridization
between subsp. indica (Benth.) Brenan and subsp. hemispherica
Ali & Faruqi. The frequent abnormalities found in pollen mother
cells meiosis of putative hybrids were pairing disturbance and precocity
at metaphase-I; and lagging chromosomes at anaphase-I. Department of Botany, University of Karachi, Karachi-75270, Pakistan. |
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