Applications of linear mixed models in Cynodon spp. breeding.

Species of the genus Cynodon are among the most cultivated forage crops in the world due to their high yield and nutritional quality, and its use in cattle feeding has been associated with gains in animal weight and increased milk production. The objective of this study was to model covariance structures in Cynodon spp. clones and study the changes in ranking of the selected genotypes, since it is believed that affects the ranking of genotypes. A total of 202 genotypes were evaluated in an experiment conducted in an augmented block design with four replications and four harvests. The genotypes were assessed for plant height, green weight, percentage of dry matter, and plant vigor. Nineteen repeated measures models with different covariance structures were tested. The best-fitted model adopts the CORH covariance structure for the genetic effects. Correct modeling of the covariance structure affected the ranking of genotypes in all variables evaluated.

Bibliographic Details

Main Authors:	ELIZEU, A. M., PEIXOTO, M. A., EVANGELISTA, J. S. P. C., CHAVES, S. F. da S., NASCIMENTO, E. F., BENITES, F. R. G., TEODORO, P. E., DIAS, K. O. das G., BHERING, L. L.
Other Authors:	ARTHUR MAYRINK ELIZEU, UNIVERSIDADE FEDERAL DE VIÇOSA; MARCO ANTÔNIO PEIXOTO, UNIVERSIDADE FEDERAL DE VIÇOSA; JENIFFER SANTANA PINTO COELHO EVANGELISTA, UNIVERSIDADE FEDERAL DE VIÇOSA; SAULO FABRÍCIO DA SILVA CHAVES, UNIVERSIDADE FEDERAL DE VIÇOSA; EMANUEL FERRARI NASCIMENTO, UNIVERSIDADE FEDERAL DE VIÇOSA; FLAVIO RODRIGO GANDOLFI BENITES, CNPGL; PAULO EDUARDO TEODORO, UNIVERSIDADE FEDERAL DE MATO GROSSO DO SUL; KAIO OLIMPIO DAS GRACAS DIAS, UNIVERSIDADE FEDERAL DE VIÇOSA; LEONARDO LOPES BHERING, UNIVERSIDADE FEDERAL DE VIÇOSA.
Format:	Artigo de periódico biblioteca
Language:	eng
Published:	2024-07-19
Subjects:	Covariance structure, Estruturas de covariância, Forragem, Melhoramento Vegetal, Genótipo,
Online Access:	http://www.alice.cnptia.embrapa.br/alice/handle/doc/1165883 http://dx.doi.org/10.1590/1984-70332024v24n3a27
Tags:	Add Tag No Tags, Be the first to tag this record!