Hybridization between Psidium guajava and P. guineense (Myrtaceae)

• Published in: Economic botany Vol. 49; no. 2; pp. 153 - 161
• Main Authors: Landrum, Leslie R., Clark, W. Dennis, Sharp, William P., Jeff Brendecke
• Format: Journal Article
• Language: English
• Published: Heidelberg The New York Botanical Garden 01-04-1995; Bronx, NY Springer; New York Botanical Garden Press
• Subjects: Agronomy. Soil science and plant productions; anatomia de la planta; anatomie vegetale; Appendages; argentina; argentine; Biological and medical sciences; Economic botany; estoma; feuille; flavonoide; flavonoides; flavonoids; Flower buds; Fruits; Fundamental and applied biological sciences. Psychology; Genetic hybridization; Genetics and breeding of economic plants; Hair; hibridacion interespecifica; hibridos; hojas; honduras; hybridation interspecifique; hybride; Hybridity; hybrids; Interspecific and intergeneric hybridization, introgressions; interspecific hybridization; Leaves; mexico; mexique; Ovaries; plant anatomy; Plant breeding: fundamental aspects and methodology; psidium; psidium guajava; Scatter diagrams; stomata; stomate; Interspecific comparison; Natural hybrid; Tropical crop; Economic importance; Tropical fruit; Psidium guajava; Dicotyledones; Morphology; Angiospermae; Interspecific hybridization; Myrtaceae; Spermatophyta; Fruit tree; Chemical properties
• ISSN: 0013-0001; 1874-9364
• DOI: 10.1007/BF02862919

Psidium guajava and P. guineense are characterized, illustrated and contrasted. Population samples of Psidium guajava and P. guineense and apparent hybrids were collected from four localities: two in Mexico, one in Honduras, and one in Argentina. Seven morphological characters, one micromorphological (stomatal density), and one chemical character (presence or absence of myricetin) that distinguish the parent species were found to be useful in the evaluation of specimens and population variation. Results were consistent with the hypothesis that hybridization occurs between these species, but in three localities it may not go beyond F1's. Back crossing between hybrids and P. guajava was not detected at any locality. / Se recolectaron muestras de poblaciones de Psidium guajava, P. guineense y posibles híbridos en cuatro localidades: dos en México, una en Honduras, una en Argentina. Se encontraron útiles en la evaluación de especímenes y variación de poblaciones siete características morfológicas, una micromorfológica (densidad de stomata), y una química (presencia o ausencia de myricetin) que distinguen las especies padres. Los resultados indican que hibridación ocurre entre las especies, pero en tres localidades es posible que hay solamente F1's. No se detectaron cruces entre híbridos y P. guajava en ninguna localidad.