Genetic parameters and selection of Brachiaria decumbens hybrids for agronomic traits and resistance to spittlebugs.

The objective of this work was to estimate genetic parameters for agronomic traits and resistance to spittlebugs in B. decumbens hybrids and to select the ones with best performance. For that, 324 hybrids were evaluated in field plots for agronomic traits and in the greenhouse for resistance to spittlebugs. Genetic variability amongst the hybrids was observed for all traits analyzed. The heritability estimates between genotypes means were higher than 0.52 for all agronomic traits and 0.98 and 0.99 for nymphal survival and nymphal period duration respectively. Hybrids with better performance than cultivar Basilisk for each individual trait were identified and also through a selection index combining all traits. Assigning weights to the different traits in the selection index did not significantly alter the rank for superior hybrids. Those were selected to continue on to the next phases of the breeding program.

Bibliographic Details

Main Authors:	MATEUS, R. G., BARRIOS, S. C. L., VALLE, C. B. do, VALERIO, J. R., TORRES, F. Z. V., MARTINS, L. B., AMARAL, P. N. C. do
Other Authors:	ROGÉRIO GONÇALVES MATEUS, Universidade Estadual de Mato Grosso do Sul - Aquidauana; SANZIO CARVALHO LIMA BARRIOS, CNPGC; CACILDA BORGES DO VALLE, CNPGC; JOSE RAUL VALERIO, CNPGC; FABRICIA ZIMERMANN VILELA TORRES, CNPGC; LUCAS BEARARI MARTINS, Universidade Estadual de Mato Grosso do Sul - Aquidauana; PEDRO NELSON CESAR do AMARAL, Universidade Estadual de Mato Grosso do Sul - Aquidauana.
Format:	Artigo de periódico biblioteca
Language:	English eng
Published:	2018-02-26
Subjects:	Spittlebugs., Cigarrinha, Genótipo, Híbrido, Brachiaria decumbens, Apomixis, Genotype, Hybrids, Agronomic traits.,
Online Access:	http://www.alice.cnptia.embrapa.br/alice/handle/doc/1088131
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