Chromosome number and meiotic behaviour of two populations of Onobrychis chorassanica Bunge (O. sect. Hymenobrychis) in Iran
محل انتشار: مجله سلول و تحقیقات مولکولی، دوره: 2، شماره: 1
سال انتشار: 1389
نوع سند: مقاله ژورنالی
زبان: فارسی
مشاهده: 422
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شناسه ملی سند علمی:
JR_JCMR-2-1_004
تاریخ نمایه سازی: 7 بهمن 1395
چکیده مقاله:
The genus Onobrychis belongs to family Fabaceae and has about 130 species throughout the world. Onobrychis sect. Hymenobrychis with nearly 14 species in Iran is one of the important sections of the genus.The chromosome number and meiotic behaviour were studied in two populations of Onobrychis chorassanicabelonging to this section native to Iran. This report is the first cytogenetic analysis of this taxon. Both populations are diploid and possess 2n = 2x = 14 chromosome number, consistent with the proposed base number of x = 7. Although these taxa displayed regular bivalent pairing and chromosome segregation atmeiosis, some meiotic abnormalities were observed. The meiotic abnormalities included varied degrees of chromosome stickiness including B-chromosome, cytomixis, asynchronous nucleus, fragmented chromosomes,occurrence of laggard chromosomes, chromosome bridges, desynapsis, micronucleous and tripolar cells
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نویسندگان
Massoud Ranjbar
Department of Biology, Herbarium division, Bu-Ali Sina University, Hamedan, Iran
roya karamian
Department of Biology, Herbarium division, Bu-Ali Sina University, Hamedan, Iran
fatemeh hajmoradi
Department of Biology, Herbarium division, Bu-Ali Sina University, Hamedan, Iran