Pakistan Journal of Biological Sciences1028-88801812-5735Asian Network for Scientific Information10.3923/pjbs.1999.537.540Allium]]>SolimanMagda I. 2199922This study was performed to determine the relationship between chromosome aberrations in PMCs and micronuclei formation as well as chiasma frequency in cultivated Allium cepa collected from two sites. One site adjacent to the high way which is characterize by heavy traffic and the plants grown exposed to the different components of ignition exhaust in air as well as in soil, The other site away from the traffic pollution as control samples. Different types of chromosomal aberrations observed in first and second meiotic cells were: bridge, stickiness, chromosome aggregates in the form of a ring, vaculated nucleus, misorientation and multinucleated cells. Micronuclei formation represented the most dominant type of mieiotic abnormalities, The results indicated that aberration percentages of meiosis I were more frequent than those of meiosis II. Also a decrease in chiasma frequency in site I over site II was observed.]]>Amer, S.M. and O.R. Farah,1979Vicia faba.]]>44907913Amer, S.M. and E. Mikhael,197260 γ-irradiation on Vicica faba.]]>37169174Bennett, M.D. and A.J. Jellings,1975Vicia faba L.]]>35261272Das, T.N., A.S. Raj and B.V.R. Rao,1968Vicia faba L. treated with asafoetida.]]>33100111Degrassi, F. and M. Rizzoni,1982Vicia faba root tips to detect mutagen damage in fresh-water pollution.]]>971933Dougherty, E.R.,1990Dowrick, G.J.,1957113749El-Ashry, Z.M.,1986Vicia faba plants.]]>1986El-Bayoumi, A.S., A. Kabarity and A. Habib,1979Allium cepa L.]]>44745755EI-Said, M.N.,19891989Fayed, A.R.,1981Vicia faba L.]]>1981Fayed, A.H. and C.U. Hesemann,1983Vicia faba L. III. Number and DNA content of micronuclei.]]>12259275Fayed, A.H., A.S. Mandour, A.A. Mahmoud and S.S.A. Soliman,1988Vicia faba.]]>177586Henderson, S.A.,19704295324Hesemann, C.U. and A.H. Fayed,1982Vicia faba. I. The occurrence and origin.]]>11235243Parker, J.S.,197549391406Raj, A.S. and S.S. Reddy,1971Vicia faba L. treated with leaf extracts of two varieties of Lathyrus sativus L.]]>36702715Rees, H. and J.B. Thompson,195610409424Sharma, R.P. and D. Singh,1968Vicia faba.]]>24309313Shaw, D.D.,1974Schistocerca gregaria forsk.]]>46365374Snedecor, G.W. and W.G. Cochran,19686th Edn.,Snow, R., 196338913Soran, V., C. Sparchez, C. Cracium and Z. Uray,1981Vicia faba) meristem after γ ray radiation.]]>46381386Stern, H., M. Westergaard and D. von Wettstein,1975Lilium longiflorum and their relation to crossing-over: A preselection hypothesis.]]>72961965Tang, Z.S., Z.X. Wang, Y.J. Tu and Y. Liu,1984Vicia faba seeds.]]>352627