Visual selection of Urochloa ruziziensis genotypes for green biomass yield

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dc.creatorDavi Henrique Lima Teixeira
dc.creatorFlávia Maria Avelar Gonçalve
dc.creatorJosé Airton Rodrigues Nunes
dc.creatorFausto Souza Sobrinho
dc.creatorFlávio Rodrigo Gandolfi Benites
dc.creatorKaio Olímpio das Graças Dias
dc.date2020
dc.date.accessioned2026-07-07T03:53:54Z
dc.descriptionThe breeding program of Urochloa ruziziensis evaluates many genotypes in initial phases. Evaluations through grades might make the selection less costly. The aim of this study was to verify the efficiency of visual selection for green biomass yield in relation to different selection strategies, such as mass selection by phenotypic mean, BLUP (Best Linear Unbiased Prediction) and at random. For this purpose, 2,309 regular genotypes were evaluated in an augmented block design in two cuts. The evaluators gave grades for plant vigor, and later, the plots were measured for green biomass yield. The coincidences of the selected genotypes were estimated by different selection strategies. Then, 254 clones of the genotypes selected in different strategies were evaluated in a clonal test in a triple lattice design in four cuts. The statistical analyses were performed in SAS using the Mixed procedure. The regular genotype level and clone-mean basis heritabilities were 31.16 and 62.91%, respectively, for green mass yield. The expected selection gains were 21.09% (visual), 25.43% (phenotypic mean), and 27.5% (BLUP). Moreover, the realized heritabilities for these strategies were 15.58, 11.87, and 15.86%, respectively, which might be associated with genotype by environment interaction. Therefore, the visual selection could be a useful strategy in initial phases of a U. ruziziensis breeding program because the efficiency was moderate to high in relation to phenotypic mean and BLUP.
dc.formatapplication/pdf
dc.identifier1679-9275
dc.identifierhttps://www.redalyc.org/articulo.oa?id=303062597022
dc.identifierhttps://www.redalyc.org/journal/3030/303062597022/
dc.identifierhttps://www.redalyc.org/journal/3030/303062597022/html/
dc.identifierhttps://www.redalyc.org/journal/3030/303062597022/303062597022.epub
dc.identifierhttps://www.redalyc.org/journal/3030/303062597022/movil
dc.identifier10.4025/actasciagron.v42i1.42444
dc.identifier.urihttp://hdl.handle.net/123456789/446598
dc.languageen
dc.publisherUniversidade Estadual de Maringá
dc.relationhttp://www.redalyc.org/revista.oa?id=3030
dc.rightsActa Scientiarum. Agronomy
dc.sourceActa Scientiarum. Agronomy (Brasil) Vol.42
dc.subjectAgrociencias
dc.titleVisual selection of Urochloa ruziziensis genotypes for green biomass yield
dc.typeartículo científico

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Acta Scientiarum. Agronomy - Universidade Estadual de Maringá