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Chromosome Studies and Polyploidy Analysis in Grasses of West Pakistan I

1969; University of Florence; Volume: 22; Issue: 2 Linguagem: Inglês

10.1080/00087114.1969.10796328

2165-5391

S. R. Baquar, Manzoor Saeed,

Chromosomal and Genetic Variations

SUMMARYChromosome studies in grasses of West Pakistan were initiated with a view to study the role of polyploidy in the evolution of species in this region. The present work comprises the chromosome numbers of 20 indigenous species, out of which counts for the following 12 species are new records or different from the previous findings including the report of Urochondra as a genus: Brachiaria ramosa (L.) Stapf (n = 12), Echinochloa colonum (L.) Link (n=9), Setaria tomentosa (Roxb.) Kunth (n = 9), Chrysopogon aucheri (Boiss.) Stapf (n=10), Cymbopogon jwarancusa (Jones) Schult. (2 n = 40), Lasiurus hirsutus (Forssk.) Boiss. (n=9), Aeluropus lago- poides (L.) Trin. (2 n=50), Dactyloctenium aegyptium (L.) Beauv. (n=9), Eragrostis pilosa (L.) Beauv. (n=10), Chloris barbata Sw. (2 n = Ca50), Sporobolus marginatus Hochst (n=9, 2 n=20) and Urochondra setulosa (Trin.) Hubb. (2 n=14).