Chromosome number in germplasm accessions of Paspalum (Plicatula group) from different regions in Brazil

• Published in: Euphytica Vol. 99; no. 2; pp. 89 - 94
• Main Authors: Takayama, S.Y. (Maringa Estadual Univ., Maringa-Parana (Brazil). Dept. de Biologia Celular e Genetica), Freitas, P.M, Pagliarini, M.S, Batista, L.A.R
• Format: Journal Article
• Language: English
• Published: Dordrecht Springer 01-01-1998; Springer Nature B.V
• Subjects: Agronomy. Soil science and plant productions; BANCO DE GENES; BANQUE DE GENES; Biological and medical sciences; BRASIL; BRAZIL; BRESIL; CHROMOSOME NUMBER; Chromosomes; Cytogenetics; ESPECE; ESPECIES; Fundamental and applied biological sciences. Psychology; GENE BANKS; Generalities. Genetics. Plant material; Genetic resources, diversity; Genetics and breeding of economic plants; GERMOPLASMA; GERMPLASM; HEXAPLOIDIA; HEXAPLOIDIE; HEXAPLOIDY; NOMBRE CHROMOSOMIQUE; NUMERO DE CROMOSOMAS; Paspalum; PASPALUM PLICATULUM; Plant material; Plicatula; SPECIES; TETRAPLOIDIA; TETRAPLOIDIE; TETRAPLOIDY; South America; Brazil; America; Monocotyledones; Polyploidy; Genetic resource; Tropical zone; Interspecific comparison; Prophase; Meiosis; Chromosomic number; Germplasm; Geographical division; Gramineae; Genetic improvement; Angiospermae; Cytogenetics; Spermatophyta; Fodder crop; Paspalum
• ISSN: 0014-2336; 1573-5060
• DOI: 10.1023/A:1018336200053

We determined the chromosome number of 52 accessions of Paspalum from the germplasm collection of the Centro de Pesquisa de Pecuária do Sudeste (CPPSE/EMBRAPA) originating from different regions in Brazil. All accessions belonged to the Plicatula group, 13 of them being P. plicatulum, three P. guenoarum, two P. yaguaronense, two P. compressifolium, one P. atratum, and 31 still unidentified Paspalum sp. Except for a P. yaguaronense accession that presented 2n=60, all the remaining ones presented 2n=40 chromosomes. This is the first report of the chromosome number of P. atratum. Considering that the basic number for most species in the genus Paspalum is ×=10, the accessions analyzed are tetraploids (2n=4×=40) and hexaploids (2n=6×=60).