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Becerril,Carlos M.; Wilcox,Charles J.; Guerrero,Victor M.. |
Correlations of measures of percentages of white coat color, five measures of production and two measures of reproduction were obtained from 4293 first lactation Holsteins from eight Florida dairy farms. Percentages of white coat color were analyzed as recorded and transformed by an extension of Box-Cox procedures. Statistical analyses were by derivative-free restricted maximum likelihood (DFREML) with an animal model. Phenotypic and genetic correlations of white percentage (not transformed) were with milk yield, 0.047 and 0.097; fat yield, 0.002 and 0.004; fat percentage, -0.047 and -0.090; protein yield, 0.024 and 0.048; protein percentage, -0.070 and -0.116; days open, -0.012 and -0.065; and calving interval, -0.007 and -0.029. Changes in magnitude of... |
Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Holstein; Phenotypic; Genetic; Environmental. |
Ano: 1996 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-84551996000400009 |
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Cunha,Ricardo Pereira da; Pedroso,Carlos Eduardo da Silva; Mittelmann,Andréa; Oliveira,Roberto Caetano de; Bohn,Alberto; Silva,Jéssica Dias Gomes da; Maia,Manoel de Souza. |
This study aims to verify, accurate and precisely, the responses of Italian ryegrass 'BRS Ponteio' cultivar to different frequencies of defoliation for forage production and especially for seed production. For this purpose, a randomized block design experiment with four replications was conducted. Four frequencies of defoliation were applied (zero, one, two, and three) based on the thermal sum, evaluating the rate of leaf appearance (LAR), phyllochron (P), leaf expansion rate (LER), leaf senescence rate (LSR), stems expansion rate (SER), tillering rate (TR), leaf life span (LL), forage production, proportion of leaf blades, stems plus sheaths, senescent material, and inflorescences, as well as seed production. Second defoliation noticeably altered the... |
Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Lolium multiflorum Lam.; Defoliation frequency; Leaf expansion rate; Leaf senescence rate; Phenotypic. |
Ano: 2016 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782016000100053 |
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