Seleção de genótipos de amendoim forrageiro para cobertura do solo e produção de biomassa aérea no período de estabelecimento utilizando-se metodologia de modelos mistos

Assis, G. M. L. de; Valentim, J. F.; Júnior, José Marques Carneiro; Azevedo, José Marlo Araújo de; Ferreira, Aliedson Sampaio

doi:10.1590/s1516-35982008001100001

Cited by 21 publications

(23 citation statements)

References 3 publications

(5 reference statements)

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“…O ano de cultivo exerceu maior influência (quadrado médio mais elevado) sobre os caracteres MST, MSF, RFC e IC que os demais fatores. A MST e a MSF foram os caracteres mais efetivos na identificação de genótipos superiores, com aptidão forrageira; tendo sofrido forte influência da interação entre genótipos e ambiente de cultivo (Assis et al, 2008;Pereira et al, 2011).…”

Section: Resultsunclassified

Variabilidade genética de caracteres forrageiros em Paspalum

Pereira

Barros

Volkmann

et al. 2012

Pesq. agropec. bras.

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Resumo -O objetivo deste trabalho foi determinar a variabilidade genética e a expressão de caracteres de interesse forrageiro em espécies de Paspalum. Os experimentos foram conduzidos em diferentes locais e anos de cultivo, em delineamento de blocos ao acaso, com três repetições. Foram avaliados cinco acessos de P. nicorae e dois de P. guenoarum, além da cultivar Pensacola (P. notatum), utilizada como testemunha. Foram quantificados os seguintes caracteres: relação folha/colmo, índice de colheita e massa de matéria seca total, de folhas e de colmo. Tanto os efeitos principais (genótipos, anos e locais de cultivo) quanto a interação entre os fatores tiveram influência significativa sobre os caracteres avaliados. Os acessos avaliados apresentam variabilidade genética em caracteres de interesse forrageiro, bem como desempenho variável de acordo com o local e o ano de cultivo. A produção de matéria seca total e de folhas são os caracteres que mais contribuem para a detecção da variabilidade genética observada, independentemente do ano de avaliação.Termos para indexação: apomixia, espécie nativa, interação genótipo x ambiente, seleção. Genetic variability of forage traits in PaspalumAbstract -The objective of this work was to determine the genetic variability and the expression of traits of interest for forage production in species of Paspalum. The experiments were carried out in different locations and crop years in randomized block design with three replicates. Five accessions of P. nicorae and two of P. guenoarum were evaluated, besides the cultivar Pensacola (P. notatum), used as a control. The following traits were determined: leaf/stalk ratio; harvest index; and total, leaf, and stalk dray matter. Both main effects (genotype, years, and locations) and the interactions among factors had significant influence on the evaluated traits. The evaluated accessions showed genetic variability in traits of interest for forage production, and their performance varied according to the location and year of cultivation. Total and leaf dry matter production are the traits that most contribute to the detection of the observed genetic variability, regardless of the year of evaluation.

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Section: Resultsunclassified

Variabilidade genética de caracteres forrageiros em Paspalum

Pereira

Barros

Volkmann

et al. 2012

Pesq. agropec. bras.

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“…Belmonte have characteristics such as a prostrated growth behavior and it is stolonifera (which protects the plant from grazing), long life cycle and tolerance to shade (Andrade et al, 2006). Assis et al (2008) evaluated 21 genotypes of pinto peanut and observed that the dry matter production varied from 1,609 to 4,132 kg/ha.year, and the Belmonte cultivar was a highlight among all genotypes. It is worthy to note that the mix between Belmonte cultivar and the forage grasses has increased the productivity and profitability of the systems where it is already in use (Andrade et al, 2012;Oliveira, 2007).…”

Section: Pinto Peanut (A Pintoi)mentioning

confidence: 99%

The utilization of tropical legumes to provide nitrogen to pastures: A review

Gimenes¹,

Barbosa²,

Gerdes³

et al. 2017

Afr. J. Agric. Res.

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. In this context, the introduction of forage legumes in the pasture system is fundamental to fix nitrogen from the atmosphere and supply it to grasses, increasing its production and persistence, enhancing animal nutrition as it grazes, at the same time. Still, the use of plant mixes in the system brings further benefits to it, such as better utilization of fertilizers as well as enhances the nutrient cycle and soil coverage. However, there are still many gaps in our knowledge regarding intercropping legumes and grasses, especially the use of tropical legumes. The purpose of this review is compiles data about forage legumes as well as analyses them to find new tendencies and gaps on the knowledge to shed some lights on researches in this area. We also expect that this review will help researchers and producers to understand the role of forage legumes in a pasture system and that there will be an increase in its utilization worldwide, especially in the tropics, where nitrogen is easily leached and lost from the pastures. With emphasis on description of promising tropical legumes but still little used Arachis pintoi, Macrotyloma and Neonotonia whightii.

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“…Therefore, the pressure of natural or artificial selection in species facing animal production aim at obtaining genotypes with emphasis on forage traits, mainly on green and total dry matter and leaf dry matter (Assis et al 2008). Thus, studies hardly ever aim at a combined selection regarding genetic gain in seed yield (Lopes and Franke 2011).…”

Section: Introductionmentioning

confidence: 99%