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Cytological analysis reveals a base chromosome number of x = 10 across nine Spartina grass species, indicating a need to revise previous taxonomic classifications.
The chromosome numbers of nine species of the genus Spartina have been determined and their meiotio pairing has been examined. All numbers are referable to either 2n = 40 (S. pectinata, S. patens, S. cynosuroides, S. gracilis, S. bakeri and S. arundinacea), 2n = 60 (S. maritima) or 2n =62 (S. alternifiora and 8. glabra). No intraspeoifio polyploids have been found. Supernumerary or B -chromosomes occur rarely in S. pectinata. Hence the basio chromosome number is deduced as being x = 10 for these speoies in contrast to former reports of x = 7. The implications of the new basic number with respect to taxonomic position are pointed out.
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C. J. Marchant (1968) studied this question.
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