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Genetica
Paris, H.S., Agricultural Research Organization, Division of Vegetable Crops, Newe Ya'ar Experiment Station, P.O., Haifa, Israel
The pachytene complement in microsporocytes was compared among ten races of Ricinus communis L., the castor plant (2n=20). Four kinds of pachytene variations were observed: (1) variation in degree of spreading of the chromosomes; (2) variation in degree of attenuation of heterochromatin; (3) variation in morphology, which appeared to be restricted to the two nucleolar organizing bivalents; (4) variation in frequency of association of each of these two bivalents with the nucleolus. It is suggested that variations in the pachytene chromosomes occur ubiquitously in this species. © 1981 Dr W. Junk Publishers.
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תנאי שימוש
Pachytene variations in Ricinus
55
Paris, H.S., Agricultural Research Organization, Division of Vegetable Crops, Newe Ya'ar Experiment Station, P.O., Haifa, Israel
Pachytene variations in Ricinus
The pachytene complement in microsporocytes was compared among ten races of Ricinus communis L., the castor plant (2n=20). Four kinds of pachytene variations were observed: (1) variation in degree of spreading of the chromosomes; (2) variation in degree of attenuation of heterochromatin; (3) variation in morphology, which appeared to be restricted to the two nucleolar organizing bivalents; (4) variation in frequency of association of each of these two bivalents with the nucleolus. It is suggested that variations in the pachytene chromosomes occur ubiquitously in this species. © 1981 Dr W. Junk Publishers.
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