MAPEO DE QTLs PARA CARACTERES RELACIONADOS A EFICIENCIA DE USO DE NITRÓGENO EN MAÍZ MEDIANTE MARCADORES SSRs Y SNPs

MANDOLINO, C.; D'ANDREA, K.E.; OLMOS, S.; OTEGUI, M.E.; EYHÉRABIDE, G.H.

Rosario, Santa Fe

Congreso; X Congreso Nacional de Maíz. Maíz HD. Una mirada en alta definición.; 2014

A.I.A.N.B.A.

Nitrogen (N) is one of the macronutrients that is most limiting to maize grain yield. Breeding for N Use Efficiency (NUE) would improve yield with less fertilizer application and the response per unit of N applied. Our objectives were to study phenotypic variability and QTLs detection for NUE and trait related to NUE in a population of recombinant inbred lines (RILs). One hundred and eighty one RILs from the cross B100 x LP2 were phenotyped for NUE, plant N uptake at maturity, protein, the proportion of N in the biomass, N harvest index and the anthesis-silking interval, during the 2009 to 2010 and 2011 to 2012 growing seasons in INTA Pergamino. Genotyping was carried out using a set of 84 microsatellites (SSRs) and 7 single nucleotide polymorphism (SNPs) markers. The population showed genotypic variability for all the traits (p