Diallel analysis of corn for special use as corn grits: determining the main genetic effects for corn gritting ability

Corn grits are used for various purposes such as flakes, snacks, livestock feed, hominy, extruded products, beer, etc. The grit size proportion varies according to the hybrid, and thus, once the use of the grits is linked to the particle size, determining the genetic effects is essential to develop...

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Bibliographic Details
Published in:Genetics and molecular research 2014-08, Vol.13 (3), p.6548-6556
Main Authors: Conrado, T V, Scapim, C A, Bignotto, L S, Pinto, R J B, Freitas, I L J, Amaral, Jr, A T, Pinheiro, A C
Format: Article
Language:English
Subjects:
Agriculture - methods
Brazil
Breeding
Crosses, Genetic
Edible Grain - genetics
Edible Grain - growth & development
Genotype
Hybrid Vigor - genetics
Hybridization, Genetic
Phenotype
Selection, Genetic
Zea mays - genetics
Zea mays - growth & development
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Summary:Corn grits are used for various purposes such as flakes, snacks, livestock feed, hominy, extruded products, beer, etc. The grit size proportion varies according to the hybrid, and thus, once the use of the grits is linked to the particle size, determining the genetic effects is essential to develop hybrids for any specific use. For this purpose a complete diallel series of crosses, involving eight parents, was performed near Maringá, PR, Brazil. The objective of this study was to evaluate the general (GCA) and specific (SCA) combining abilities of 28 progeny for selection of hybrids for breeding programs and extraction of inbred lines for hybrid development. The response variables, such as plant height, ear insertion height, crop stand, grain yield, and grits, small grits and bran production, were gauged and appraised for each of the 28 progeny. The trait effects and GCA were significant for all response variables, while for SCA, only grain yield and crop stand showed significance (P < 0.05), according to Griffing (1955) analysis. A significant weak negative partial correlation was found between grain yield and grits conversion. In relation to the hybrid selection for breeding programs, the parent IAC Nelore was highly recommended for recurrent selection and the hybrids IPR 119 x HT 392 and IAC Nelore x HD 332 for the extraction of pure lines for hybrid development.
ISSN:1676-5680
1676-5680
DOI:10.4238/2014.August.26.5