Chromosome numbers in South American species of Bothriochloa (Poaceae: Andropogoneae) and the evolutionary history of the genus

L. R. SCRIVANTI; I. CAPONIO,; A. M. ANTON; G. A. NORRMANN

PLANT BIOLOGY

WILEY-BLACKWELL PUBLISHING, INC

Año: 2010 vol. 12 p. 910 - 916

1435-8603

Mitotic chromosome numbers of 14 taxa of Bothriochloa native to Argentina, Brazil, and Uruguay were surveyed. Chromosome numbers of B. eurylemma, B. meridionalis, and B. velutina are reported for the first time with 2n = 6x = 60, and this ploidy level is the most common among the studied taxa. In addition, new cytotypes were found for B. alta (2n = 60), B. barbinodis (2n = 60), B. exaristata (2n = 80), B. laguroides var. torreyana (2n = 80), B. longipaniculata (2n = 60 and 80), B. perforata (2n = 60), and B. springfieldii (2n = 60). These numbers differ from those reported in the literature.Bothriochloa native to Argentina, Brazil, and Uruguay were surveyed. Chromosome numbers of B. eurylemma, B. meridionalis, and B. velutina are reported for the first time with 2n = 6x = 60, and this ploidy level is the most common among the studied taxa. In addition, new cytotypes were found for B. alta (2n = 60), B. barbinodis (2n = 60), B. exaristata (2n = 80), B. laguroides var. torreyana (2n = 80), B. longipaniculata (2n = 60 and 80), B. perforata (2n = 60), and B. springfieldii (2n = 60). These numbers differ from those reported in the literature.