Associação entre caracteres e análise de trilha na seleção de progênies de meios-irmãos de Brachiaria ruziziensis

Sobrinho, Fausto Souza; Silva, Francisco José da; Köpp, Maurício Marini

doi:10.1590/s0034-737x2011000600013

Cited by 18 publications

(19 citation statements)

References 12 publications

(18 reference statements)

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…An indirect trait with high heritability may provide genetic progress faster than the direct selection on a main trait, especially when the main trait shows low heritability and is difficult to measure (Carvalho et al, 2001). In Brachiaria, Borges et al (2011) also observed a strong correlation of total dry matter with leaf dry matter and culm dry matter. Basso et al (2009) also detected strong associations between TDM and LDM of Paspalum in the different study locations.…”

Section: Trait Meanmentioning

confidence: 72%

“…According to Souza Sobrinho et al (2005), the leaf:culm ratio expresses the variations in the proportion between leaf blade and culm, which is very important for the selection of grazing-tolerant genotypes. However, in spite of reduced heritabilities of LCR, TIN and HI, the results may vary according to the population evaluated, estimation method, unit and experimental precision, without meaning that the results could be definitively extrapolated to other environments or populations (Blank et al, 2010;Borges et al, 2011).…”

Section: Resultsmentioning

confidence: 99%

“…A number of studies have been carried out to assist in obtaining genetic gain in the genera Brachiaria, Pennisetum, Trifolium, and others through breeding programs (Montardo et al, 2003;Silva et al, 2008;Borges et al, 2011), but in relation to the genus Paspalum, there are no reports of such studies in the literature. In this way, studies on heritability and correlation can provide more conclusive criteria on the selection pressure of a species, favoring the selection of genotypes with superior performance (Benin et al, 2009;Galarça et al, 2010).…”

Section: Introductionmentioning

confidence: 99%

“…Therefore, path analysis comes up as a complementary technique indicating the true associations of cause and effect on the main variable of interest. This procedure aims to measure the true relationships such as in the components of grain yield of grain species (Lopez & Franke, 2011;Krüger et al, 2011), as well as forage species (Silva et al, 2008;Borges et al, 2011).…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Genetic gain in apomictic species of the genus Paspalum

et al. 2017

View full text Add to dashboard Cite

1The objective of this work was to provide means to obtain genetic gain in apomictic species of the genus Paspalum by identifying traits that simultaneously show high correlation and heritability. Thus, to determine the amount of phenotypic variation due to genetic and environmental effects and the degree of association between leaf dry matter production and other traits of forage interest that are easy to select and measure will bring agility and economy in the selection of forage species. The experiment was conducted in the years 2009/10 and 2010/11 in the municipalities of Eldorado do Sul and Augusto Pestana, RS, Brazil, in a randomized complete block design with three replicates. The increase in the direct selection pressure on total and leaf dry matter of apomictic accesses of the genus Paspalum is enhanced by a greater contribution of genetic effects than environmental effects on the composition of the phenotypic variance. Efficient genetic gain in leaf production is achieved by indirect selection of total dry matter, which is a trait of high heritability and easy to select and measure.

show abstract

Section: Trait Meanmentioning

confidence: 72%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Genetic gain in apomictic species of the genus Paspalum

et al. 2017

View full text Add to dashboard Cite

show abstract

“…& C.M. Evrard) Crins (Borges et al, 2011) e Pennisetum purpureum Schumach. (Menezes et al, 2014), esta análise ainda não foi empregada para a espécie U. brizantha.…”

Section: Forage Quality Trait Contribution To Crude Protein Content Iunclassified

Contribuição dos caracteres de qualidade da forragem ao teor de proteína bruta em Urochloa brizantha

Torres

Valle

Lempp

et al. 2016

Pesq. agropec. bras.

View full text Add to dashboard Cite

Resumo -O objetivo deste trabalho foi identificar quais caracteres qualitativos poderão ser usados na seleção direta e indireta de genótipos de Urochloa brizantha, quanto ao teor de proteína bruta. Foram avaliados nove genótipos, em delineamento de blocos ao acaso, com duas repetições. Os caracteres qualitativos avaliados foram: volume de gás acumulado nas frações rápida e lenta, proteína bruta, fibras em detergentes neutro e ácido, celulose, lignina, sílica e digestibilidade in vitro da matéria orgânica. A digestibilidade in vitro da matéria orgânica é indicada tanto para a seleção direta quanto indireta de genótipos de U. brizantha com maior teor de proteína bruta.Termos para indexação: análise de trilha, associação entre caracteres, melhoramento genético, teor de proteína bruta. Forage quality trait contribution to crude protein content in Urochloa brizanthaAbstract -The objective of this work was to identify which qualitative characters can be used in the direct and indirect selections for high-protein content of Urochloa brizantha genotypes. Nine genotypes were evaluated in a randomized complete block design, with two replicates. The following qualitative traits were studied: volume of packed gas in fast and slow fractions, crude protein, acid and neutral detergent fibers, cellulose, lignin, silica, and in vitro digestibility of organic matter. The in vitro digestibility of organic matter is indicated for both direct and indirect selections of U. brizantha genotypes with higher crude protein content.

show abstract