Open AccessKaryotypes and population structure in aneuploid Hierochloë alpina ssp. alpina (Gramineae) in northern Scandinavia
Author(s) -
WEIMARCK GUNNAR
Publication year - 1976
Publication title -
hereditas
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.819
H-Index - 50
eISSN - 1601-5223
pISSN - 0018-0661
DOI - 10.1111/j.1601-5223.1976.tb01551.x
Subject(s) - biology , taxon , apomixis , facultative , botany , population , karyotype , poaceae , zoology , chromosome , ploidy , genetics , demography , sociology , gene
The chromosome numbers of 65 plants of Hierochloë alpina (Willd.) Roemer and Schultes ssp. alpina from 12 populations ranged from 64 to 78. Thirteen different karyotypes were represented. Most chromosomes were metacentric, but subtelocentric and telocentric markers occurred in some populations. Phenotypic variation in chromatographically obtained spot patterns was found. Apomixis previously found in the taxon is presumed to be facultative. H. alpina ssp. alpina from other parts of the area of distribution than northern Scandinavia is not known to be cytologically variable to this extent, nor are other taxa of Hierochloë . The origin and geographic distribution of cytologic aberrancy and its possible evolutionary and phytogeographical implications are discussed.