Effect of different proportions of exotic germplasm on grain yield and grain moisture in maize

• Published in: Genetika (Beograd) Vol. 43; no. 1; pp. 67 - 73
• Main Authors: Nastasic, Aleksandra, Ivanovic, Mile, Stojakovic, Milisav, Stanisavljevic, Dusan, Treskic, Sanja, Mitrovic, Bojan, Drazic, Slobodan
• Format: Journal Article
• Language: English
• Published: 2011
• Subjects: CONTENIDO DE HUMEDAD; CROP YIELD; GENETIC PARAMETERS; GERMOPLASMA; GERMPLASM; GRAIN; GRANOS; HABRIDOS; http://www.fao.org/aos/agrovoc#c_10176; http://www.fao.org/aos/agrovoc#c_24847; http://www.fao.org/aos/agrovoc#c_3249; http://www.fao.org/aos/agrovoc#c_32896; http://www.fao.org/aos/agrovoc#c_3346; http://www.fao.org/aos/agrovoc#c_3707; http://www.fao.org/aos/agrovoc#c_4886; http://www.fao.org/aos/agrovoc#c_8504; HYBRIDE; HYBRIDS; Inbreeding; INTRODUCED VARIETIES; MOISTURE CONTENT; PARAIMETROS GENATICOS; PARAMATRE GANATIQUE; RENDEMENT DES CULTURES; RENDIMIENTO DE CULTIVOS; TENEUR EN EAU; VARIATA INTRODUITE; VARIEDADES NATURALIZADAS; ZEA MAYS
• ISSN: 0534-0012; 1820-6069
• DOI: 10.2298/GENSR1101067N

Two main questions in programs introgressing exotic maize germplasm into temperate materials are the choice of available exotic sources to work with, and the proportion of exotic germplasm that should be incorporated into adapted germplasm. The objective of this study was to compare effects of different proportions of tropical maize inbred line NC298 in hybrids male parent on grain yield and grain moisture content, using method of orthogonal polynomials Methods of direct crosses and backcrosses were used to form four hybrid groups (six hybrids each) containing 0, 25, 50 and 75 percent of tropical exotic germplasm, respectively, by their male parent (or one half of mentioned proportions in the corresponding hybrids). The linear components of the germplasm proportions sum of squares, were significant (p is less than 0.01) for both grain yield and moisture content and the cubic effect (p is less than 0.05) for grain yield only. Results in this study clearly suggested backcross foundation populations with an adapted line to be appropriate selection sources for both grain yield and grain moisture content.