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image of Israel Journal of Plant Sciences

The meiotic process of microsporogenesis in jojoba was characterized by using young flower buds collected from natural stands. Chromosome counts on several hundred samples revealed no deviation from 2n = 52 chromosomes. The occasional appearance of a ring-of-four or quadrivalent configuration of chromosomes at diakinesis suggests the polyploid nature of this plant. The entire meiotic process, however, is remarkably regular as in a diploid species. Unusual characteristics of meiosis include the occurrence of multi-nucleoli in both prophase and interphase and the frequent appearance of a darkly-staining body resembling a B chromosome. No sex chromosomes were identified in this dioecious species.

Affiliations: 1: Department of Plant Sciences, University of Arizona


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1. Hogan L.,"Jojoba: a new crop for arid regions." Ritchie G.L.1979177205AAAS selected symposium on new agricultural crops (,)
2. Jauhar P.O., Yermanos D.M."Cytological studies on jojoba, Simmondsia chinensis (Link) Schneider."Genetics1979Vol 9153
3. Jauhar P.P."Cytogenetic studies in relation to breeding superior cultivars of jojoba. Proc. 5th Int. Conf. on Jojoba"19826377
4. Raven P.H., Kyhos D.W., Hill A.J."Chromosome number of spermatophytes, mostly Californian."Aliso1965Vol 6105113
5. Sherman R.A., Ray D.T."Chromosome number in Simmondsia chinensis"Jojoba Happenings1978Vol 2224

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