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CHROMOSOME MORPHOLOGY IN THE GENUS SAMBUCUS
Author(s) -
Ourecky Donald K.
Publication year - 1970
Publication title -
american journal of botany
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.218
H-Index - 151
eISSN - 1537-2197
pISSN - 0002-9122
DOI - 10.1002/j.1537-2197.1970.tb09813.x
Subject(s) - biology , karyotype , chromosome , chromosome number , genus , genetics , aneuploidy , ploidy , botany , gene
Two basic chromosome karyotypes were found in the genus Sambucus . Chromosome numbers were observed to be 2 n = 38 for S. callicarpa, S. cerulea, S. glauca, S. kamtschatica, S. melanocarpa, S. mexicana, S. miquelli, S. sibirica , and S. sieboldiana and 2 n = 36 for S. simpsonii and S. williamsii . Measurements of 18 karyotypes are presented. The major differences between the two basic chromosome karyotypes can be explained as the result of a mis‐division of a metacentric chromosome giving rise to two telocentric chromosomes, thus reducing the number of metacentrics from five to four and increasing the chromosome number from 2 n = 36 to 2 n = 38. Observed chromosome aberrations and aneuploidy may result from unstable telocentric chromosomes.