title: Grain and tortilla quality in landraces and improved maize grown in the highlands of Mexico.
abstract: The maize produced in the highlands of Mexico (>2,400 masl) is generally not accepted by the flour and masa and tortilla industry. The objective of this work was to evaluate the grain quality and tortilla properties of maize landraces commonly grown in the highlands of Mexico and compare them with improved germplasm (hybrids). Germplasm analysis included 11 landraces, 32 white hybrids, and six yellow hybrids. Grain quality was analyzed for a range of physical and chemical factors, as well as for alkaline cooking quality. Landrace grains tended to be heterogeneous in terms of size, hardness and color. All landraces had soft-intermediate grains with an average flotation index (FI) of 61%. In contrast, hybrid grains were homogenous in size and color, and harder than landrace grains, with a FI of 38%. Protein, free sugars, oil and phenolic content in landraces were higher than in the hybrids. Significant correlations were found between phenolic content and tortilla color (r= -0.60; p<0.001). Three landraces were identified as appropriate for the masa and tortilla industry, while all the hybrids evaluated fulfilled the requirements of this industry.
authors: Laboratorio de Calidad de Maíz, Instituto Nacional de Investigaciones Forestales, Agrícolas y Pecuarias, Campo Experimental Valle de México, Km 13.5 Carretera Los Reyes-Texcoco, Coatlinchan, Texcoco, 56250, Edo de México, Mexico. gricelda_vazquez@yahoo.com
authors: Gricelda
authors: G
authors: Vázquez-Carrillo
authors: Silverio
authors: S
authors: García-Lara
authors: Yolanda
authors: Y
authors: Salinas-Moreno
authors: David J
authors: DJ
authors: Bergvinson
authors: Natalia
authors: N
authors: Palacios-Rojas
references: Arch Latinoam Nutr. 2001 Mar;51(1):86-94
references: 11515238
references: Plant Foods Hum Nutr. 2009 Mar;64(1):18-24
references: 19153833
references: J Agric Food Chem. 2007 Jul 25;55(15):6169-76
references: 17608427
references: Plant Foods Hum Nutr. 2010 Jun;65(2):152-7
references: 20396953
references: Plant Foods Hum Nutr. 2008 Sep;63(3):119-25
references: 18600459
references: J Agric Food Chem. 2007 May 16;55(10):4177-83
references: 17455952
references: Plant Foods Hum Nutr. 2004 Spring;59(2):51-4
references: 15678751