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- W2063001569 abstract "Chromosome numbers and configuration patterns were investigated at meiotic metaphase I in pollen mother cells of Carex sociata Boott collected from the Ryukyu Islands. Intraspecific aneuploidy composed of five consecutive chromosome numbers from 2 n=40 to 2 n=44 was found, and 2 n=42 and 2n =44 aneuploids were both common. Almost all individuals examined showed stable chromosome associations at meiosis and almost all populations were characterized by a single chromosome number. These facts indicate the establishment of cytodemes in all localities, but the geographical distribution of each aneuploid type is widely overlapping. However, no obvious differences were found with respect to morphological, ecological, and genetic traits between the 2 n=42 and 2n =44 aneuploids. Wright's inbreeding coefficients were highly positive, suggesting high levels of inbreeding of this species. The FST-values calculated among 11 populations were significantly positive at all examined loci, indicating the high levels of genetic differentiation among populations. Spatial autocorrelation analysis showed small-scale genetic structure in a population. These facts with respect to breeding system and genetic structure indicate the extreme genetic differentiation and substructuring of C. sociata populations. We concluded that these reproductive traits such as restricted gene flow and inbreeding resulted in aneuploid differentiation among populations in C. sociata." @default.
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- W2063001569 date "2000-04-01" @default.
- W2063001569 modified "2023-10-11" @default.
- W2063001569 title "Aneuploidal population differentiation in Carex sociata Boott (Cyperaceae) of the Ryukyu Islands, Japan" @default.
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- W2063001569 doi "https://doi.org/10.1111/j.1095-8339.2000.tb01216.x" @default.
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