SciELO - Scientific Electronic Library Online

 
vol.35 número3Aspectos técnicos y caracterización del productor de durazno en el Estado de México, MéxicoDiferencias genéticas entre poblaciones de Anastrepha ludens (Loew) de hospederos nativos y exóticos en el NE México índice de autoresíndice de assuntospesquisa de artigos
Home Pagelista alfabética de periódicos  

Agricultura técnica en México

versão impressa ISSN 0568-2517

Resumo

MONDRAGON JACOBO, Candelario; TORIZ AHUMADA, Luis Miguel  e  GUZMAN MALDONADO, Salvador Horacio. Characterization of guava selection for the Bajio region of Guanajuato, Mexico. Agric. Téc. Méx [online]. 2009, vol.35, n.3, pp. 315-322. ISSN 0568-2517.

Guava (Psidium guajava L.) production and consumption in Mexico is based on traditional varieties types "Media China" and "Peruana" among others. They were selected by farmers using the mexican germplasm available in the central semiarid region of Mexico. The objective of this study was to characterize eight guava selections: seven with pink flesh and one of white flesh, developed by the horticulture program of the National Research Institute for Forestry, Agriculture and Livestock (INIFAP). The study was conducted at the Bajio research station, Celaya, Guanajuato, during 2007 and 2008. The selected trees were grown from seed obtained from an open pollinated collection of guava trees from Brazil and Mexico. The studied trees represented the second generation of individual selection. The plant characters studied were: vigour, phenology, tolerance to the disease locally known as "clavo" (Pestalotiopsis psidii) and low temperatures. The fruit characters were: flesh color, weight, shape, seed content, titratable acidity, total solid content, C vitamin and lycopene. Seven selections of pink flesh color were characterized, their IDs are: 23-1, 26-8, 23-5, 25-5, 21-17, 22-11 and 25-9 and one with white flesh; 21-9. All pink selections show: large fruits, 118.4 to 207.6 g, produced from 6.5 to 34.7 kg per tree, its sugar content varied from 10.1 to 13.1 °Brix, C vitamin from 83.29 to 185.75 mg 100 g and lycopene from 0.54 to 3.28 mg 100 g. Its natural harvest season extended from September 1 to November 15. In comparison, "Media China" shows a mean weight of 48 g per fruit, 11.6 °Brix, 231.49 mg 100 g of C vitamin, 0.53 mg 100 g of lycopene and a natural harvest season from November to January. The studied selections can be a complement for the commercial varieties in terms of fruit type and harvest season. Fruit characters observed in the selections compete with those of the commercial varieties.

Palavras-chave : Psidium guajava L.; fruit quality; guava breeding; vitamin C.

        · resumo em Espanhol     · texto em Espanhol     · pdf em Espanhol