Nuclear genome size and cytotype analysis in Agave cupreata Trel. & Berger (Agavaceae)

Autores: 
Palomino, G. Martínez.
J. Cepeda-Cornejo.
V.
Pimienta-Barrios, E.
Revista y/o libro: 
Caryologia: International Journal of Cytology, Cytosystematics and Cytogenetics
Volumen: 
65(4), 281-294
Año: 
2012
Sinopsis: 
This study is a cytogenetic characterization by karyotyping and of the DNA content of populations of Agave cupreata from the Guerrero State, Mexico. Three of the studied populations were diploids (2n = 2x =60) and one population had tetraploid (2n = 4x = 120), pentaploid (2n = 5x = 150) and hexaploid (2n = 6x = 180) plants. The diploid populations displayed a 0.63% variation in 2C DNA content. The mean 2C DNA content was 7.88 pg; 1Cx value = 3.94 pg in diploids of Agave cupreata. Tetraploids had 2C = 16.54 pg DNA, i.e. approximately four times the 1Cx value; 2C DNA amounts of pentaploid and hexaploid were equal to 20.42 and 23.92 pg DNA, respectively.