Document Details

Document Type : Article In Journal 
Document Title :
karyotype analysis in three Species of acacia
تحليل النمط النووي في ثلاثة أنواع من الأكاسيا
 
Subject : karyotype analysis in three Species of acacia 
Document Language : English 
Abstract : Species limits were investigated within the Fusarium graminearum clade (Fg clade) through phylogenetic analyses of DNA sequences from portions of 11 nuclear genes including the mating-type (MAT) locus. Nine phylogenetically distinct species were resolved within the Fg clade, and they all possess contiguous MAT1-1 and MAT1-2 idiomorphs consistent with a homothallic reproductive mode. In contrast, only one of the two MAT idiomorphs was found in five other species, four of which were putatively asexual, and the other was heterothallic. Molecular evolutionary analyses indicate the MAT genes are under strong purifying selection and that they are functionally constrained, even in species for which a sexual state is unknown. The phylogeny supports a monophyletic and apomorphic origin of homothallism within this clade. Morphological analyses demonstrate that a combination of conidial characters could be used to differentiate three species and three species pairs. Species rank is formally proposed for the eight unnamed species within the Fg clade using fixed nucleotide characters. 
ISSN : 1608-6597 
Journal Name : j.of genetic eng 
Volume : 3 
Issue Number : 1 
Publishing Year : 1425 AH
2005 AD 
Article Type : Article 
Added Date : Saturday, March 9, 2013 

Researchers

Researcher Name (Arabic)Researcher Name (English)Researcher TypeDr GradeEmail
ندى حسن التواتيTouati, Nada HassanResearcherDoctoratenaltwaty@yahoo.com

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