Agronomía Tropical (2004) 54, 257-273

Aída Ortiz Domínguez, Osvaldo Gómez and Catalina Ramis (2004)
Caracterización bioquímica de poblaciones del complejo de maleza arroz rojo en Venezuela
[Biochemical characterization of populations of red rice weed complex in Venezuela]
Agronomía Tropical 54 (3), 257-273
Abstract: In Venezuela, the red rice weed complex is composed of three species of the gender Oryza, Oryza sativa L. (60%), O. rufipogon Griff (39%) and O. latifolia Desv. (1%). The objective of this research was to compare 15 red rice populations using electrophoretic techniques in starch and polyacrylamide gel. Crude extracts of seed plumules, aged 14 days after sowing, obtained from seed collected in rice farms of Portuguesa, Calabozo, Cojedes and Barinas, were used to evaluate 5 isoenzymatic systems (IDH, PGD, PGI, K and 2 EST). Five repetitions of each isoenzyme were made. Data were submitted to a multivariate analysis of hierarchical tree using Euclidian distance with a criterion of aggregation UPGMA in the program CIRAD, which generated a dendogram. Results showed that the species O. latifolia was different from the other populations and/or species in this study, for all the isoenzymatic systems, whereas species O. sativa and O. rufipogon, showed a high phylogenic affinity, with similar band patterns for certain populations.
(The abstract is excluded from the Creative Commons licence and has been copied with permission by the publisher.)
(original language: Spanish)

Research topic(s) for pests/diseases/weeds:
general biology - morphology - evolution

---

Pest and/or beneficial records:

Beneficial	Pest/Disease/Weed	Crop/Product	Country	Quarant.
	Oryza (weeds)	Rice (Oryza)	Venezuela