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  <title>DSpace Communidade: Embrapa Caprinos (CNPC)</title>
  <link rel="alternate" href="https://www.alice.cnptia.embrapa.br/alice/handle/item/11" />
  <subtitle>Embrapa Caprinos (CNPC)</subtitle>
  <id>https://www.alice.cnptia.embrapa.br/alice/handle/item/11</id>
  <updated>2026-08-11T20:42:02Z</updated>
  <dc:date>2026-08-11T20:42:02Z</dc:date>
  <entry>
    <title>Fermentative characteristics and bromatological composition of pigeon pea (Cajanus cajan) silage at different silo opening times.</title>
    <link rel="alternate" href="https://www.alice.cnptia.embrapa.br/alice/handle/doc/1189070" />
    <author>
      <name>VASCONCELOS, F. J. de O.</name>
    </author>
    <author>
      <name>ALVES, C. B.</name>
    </author>
    <author>
      <name>SOUSA, V. A. de</name>
    </author>
    <author>
      <name>MORAES, I. C. L. de</name>
    </author>
    <author>
      <name>GUEDES, F. L.</name>
    </author>
    <author>
      <name>BEZERRA, J. W. T.</name>
    </author>
    <author>
      <name>TONUCCI, R. G.</name>
    </author>
    <id>https://www.alice.cnptia.embrapa.br/alice/handle/doc/1189070</id>
    <updated>2026-08-10T13:42:38Z</updated>
    <published>2026-01-01T00:00:00Z</published>
    <summary type="text">Título: Fermentative characteristics and bromatological composition of pigeon pea (Cajanus cajan) silage at different silo opening times.
Autoria: VASCONCELOS, F. J. de O.; ALVES, C. B.; SOUSA, V. A. de; MORAES, I. C. L. de; GUEDES, F. L.; BEZERRA, J. W. T.; TONUCCI, R. G.
Conteúdo: Abstract: Pigeon pea (Cajanus cajan) shows potential as a forage alternative for the Brazilian semiarid region due to its hardiness and high crude protein content. However, its ensiling process faces challenges related to its high buffering capacity, which compromises fermentative efficiency. This study evaluated the fermentative profile and bromatological composition of pigeon pea silage at different silo opening times. Fermentative parameters (pH, ammoniacal nitrogen/N-NH3 ) and bromatological components (dry matter, crude protein, neutral detergent fiber – NDF, acid detergent fiber – ADF, hemicellulose, cellulose, and lignin) were analyzed. The results indicated stability in NDF, ADF, and cellulose contents over time, with significant variation in lignin, associated with the degradation of soluble fractions and oxidative processes. The fermentative profile revealed relatively high pH values and accumulation of N-NH3 , reflecting intense proteolysis and low efficiency of lactic fermentation. It is concluded that pigeon pea silage, although presenting relevant protein value, shows fermentative and nutritional limitations, especially due to the accumulation of non-protein nitrogen compounds and lignin content, factors that reduce fiber digestibility. These results reinforce the need for management strategies, such as the use of additives or associations with grasses, to optimize the fermentative process and expand the use of pigeon pea as conserved forage in semiarid regions. Resumo: O feijão guandu (Cajanus cajan) apresenta potencial como alternativa forrageira para o semiárido brasileiro devido à sua rusticidade e ao elevado teor de proteína bruta. No entanto, sua ensilagem enfrenta desafios relacionados à elevada capacidade tampão, que compromete a eficiência fermentativa. Este estudo avaliou o perfil fermentativo e a composição bromatológica da silagem de guandu em diferentes períodos de abertura dos silos. Foram analisados parâmetros fermentativos (pH, nitrogênio amoniacal/N-NH3) e bromatológicos (matéria seca, proteína bruta, fibra em detergente neutro – FDN, fibra em detergente ácido – FDA, hemicelulose, celulose e lignina). Os resultados indicaram estabilidade nos teores de FDN, FDA e celulose ao longo do tempo, com variação significativa para lignina, associada à degradação de frações solúveis e processos oxidativos. O perfil fermentativo revelou pH relativamente elevado e acúmulo de N-NH3, refletindo intensa proteólise e baixa eficiência da fermentação lática. Conclui-se que a silagem de guandu, embora apresente valor proteico relevante, possui limitações fermentativas e nutricionais, especialmente devido ao acúmulo de compostos nitrogenados não proteicos e ao teor de lignina, fatores que reduzem a digestibilidade da fibra. Tais resultados reforçam a necessidade de estratégias de manejo, como o uso de aditivos ou associações com gramíneas, para otimizar o processo fermentativo e ampliar a utilização do guandu como volumoso conservado no semiárido.</summary>
    <dc:date>2026-01-01T00:00:00Z</dc:date>
  </entry>
  <entry>
    <title>Evaluation of the nutritional state and proposal of sufficiency ranges for Megathyrsus maximus ‘BRS Tamani’ using the compositional nutrient diagnosis and boundary line methods.</title>
    <link rel="alternate" href="https://www.alice.cnptia.embrapa.br/alice/handle/doc/1188614" />
    <author>
      <name>MESQUITA, A. M. S. de</name>
    </author>
    <author>
      <name>ROZANE, D. E.</name>
    </author>
    <author>
      <name>POMPEU, R. C. F. F.</name>
    </author>
    <author>
      <name>CÂNDIDO, M. J. D.</name>
    </author>
    <author>
      <name>LOPES, M. N.</name>
    </author>
    <author>
      <name>NATALE, W.</name>
    </author>
    <author>
      <name>CONCEIÇÃO, M. P. da</name>
    </author>
    <author>
      <name>LIMA, J. D.</name>
    </author>
    <author>
      <name>TAVARES, R. de K. O.</name>
    </author>
    <author>
      <name>SOUZA, H. A. de</name>
    </author>
    <id>https://www.alice.cnptia.embrapa.br/alice/handle/doc/1188614</id>
    <updated>2026-07-26T13:56:28Z</updated>
    <published>2026-01-01T00:00:00Z</published>
    <summary type="text">Título: Evaluation of the nutritional state and proposal of sufficiency ranges for Megathyrsus maximus ‘BRS Tamani’ using the compositional nutrient diagnosis and boundary line methods.
Autoria: MESQUITA, A. M. S. de; ROZANE, D. E.; POMPEU, R. C. F. F.; CÂNDIDO, M. J. D.; LOPES, M. N.; NATALE, W.; CONCEIÇÃO, M. P. da; LIMA, J. D.; TAVARES, R. de K. O.; SOUZA, H. A. de
Conteúdo: Abstracts: Brazil has the largest commercial cattle herd in the world, with 197.2 million head in 2023, representing approximately 12 % of the global herd. Cattle raising in Brazil is primarily carried out in pasture grazing systems. In this context, the adoption of well-adapted, high-yielding, and nutritious forage crops is essential for the sustainability of cattle raising, cost reduction, and increased yield efficiency. The cultivar ‘BRS Tamani’, a Megathysus maximus hybrid, stands out for its short plant height, high nutritional value, and resistance to pasture spittlebug and is recommended for well-drained soils of medium to high fertility, typical of the Brazilian Cerrado region. Despite its high potential, information is lacking regarding nutritional standards for the cultivar, which hinders precise fertilization recommendations. This study aimed to establish nutritional sufficiency ranges for BRS Tamani using the Compositional Nutrient Diagnosis (CND) and boundary line methods, aiming to improve nutrient management and promote yield gains. A database was used to compile information from 123 experimental units of BRS Tamani during the period from July to December 2017. Leaf samples were collected at various growth cycles / cuttings of the forage crop, and chemical analyses were performed to determine contents of nitrogen (N), phosphorus (P), potassium (K), calcium (Ca), magnesium (Mg), and sulfur (S). The CND method was used to calculate nutritional levels and identify nutrient imbalances. The boundary line method was applied to establish relationships between yield and the levels of each nutrient. The following critical levels were proposed by the CND: N = 20 g kg-1; P = 2.2 g kg-1; K = 20 g kg-1; Ca = 2.3 g kg-1; Mg = 2.8 g kg-1; and S = 1.4 g kg-1. The values obtained by the boundary line method were as follows: N = 23 g kg-1; P = 2.3 g kg-1; K = 20 g kg-1; Ca = 2.6 g kg-1; Mg = 2.8 g kg-1; and S = 1.3 g kg-1. Highlights: Suggestion of sufficiency ranges for nutrient diagnosis of Megathyrsus maximus ‘BRS Tamani’. The CND and boundary line methods enable determination of sufficiency ranges for forage crops. Region-specific nutritional standards should be established for forage crops.</summary>
    <dc:date>2026-01-01T00:00:00Z</dc:date>
  </entry>
  <entry>
    <title>Avanços na genética e melhoramento de gramíneas forrageiras do gênero Urochloa por meio de ferramentas moleculares.</title>
    <link rel="alternate" href="https://www.alice.cnptia.embrapa.br/alice/handle/doc/1188316" />
    <author>
      <name>LEÃO, U. S.</name>
    </author>
    <author>
      <name>GIRÃO, M. V. D.</name>
    </author>
    <author>
      <name>BUENO, L. G.</name>
    </author>
    <author>
      <name>SILVA, G. R. da</name>
    </author>
    <author>
      <name>DINIZ, F. M.</name>
    </author>
    <id>https://www.alice.cnptia.embrapa.br/alice/handle/doc/1188316</id>
    <updated>2026-07-19T14:51:50Z</updated>
    <published>2026-01-01T00:00:00Z</published>
    <summary type="text">Título: Avanços na genética e melhoramento de gramíneas forrageiras do gênero Urochloa por meio de ferramentas moleculares.
Autoria: LEÃO, U. S.; GIRÃO, M. V. D.; BUENO, L. G.; SILVA, G. R. da; DINIZ, F. M.
Conteúdo: Resumo: Gramíneas do gênero Urochloa constituem um dos grupos mais empregados na alimentação de animais ruminantes no mundo. O objetivo desta investigação foi realizar uma revisão sistemática reunindo estudos relevantes às temáticas ligadas à genética, melhoramento e marcadores moleculares comumente aplicados nos processos de melhoramento do gênero Urochloa. O pacote R de análise bibliométrica, Bibliometrix, processou os dados obtidos nas buscas. O estudo indicou que o Brasil é o país com maior número de publicações relacionadas ao gênero. Os marcadores moleculares mais utilizados são os microssatélites, RAPDs e SNPs, que foram ideais para a construção de mapas de ligação e estudos de diferenciação e diversidade genética. Ficou evidente a necessidade de ampliação dos estudos genéticos em outras espécies de Urochloa, de forma a facilitar a seleção de caracteres de interesse e o direciona-mento de cruzamentos que garantam a formação de genótipos com maior variabilidade genética para exploração nos programas de melhoramento. Abstract: The grasses of the genus Urochloa (synonym Brachiaria) are utilized extensively for animal grazing in the world. The aim of this study was to carry out a systematic review, bringing together studies related to genetics, breeding and use of molecular markers in Urochloa grasses. The R-package Bibliometrix was used for bibliometric and co-citation analysis in this research. Brazil stood out as the country with the largest number of publications related to the genus. Most used molecular markers were microsatellites, RAPDs and SNPs, which were ideal for building linkage maps and for studies of differentiation and genetic diversity. The need to expand genetic studies in other species of Urochloa became evident; in order to allow the selection of characters of interest and the direction of crosses that guarantee the formation of genotypes with greater genetic variability for exploitation in breeding programs. Resumen: Gramíneas do gênero Urochloa constituem um dos grupos mais empregados na alimentação de animais ruminantes no mundo. O objetivo desta investigação foi realizar uma revisão sistemática reunindo estudos relevantes às temáticas ligadas à genética, melhoramento e marcadores moleculares comumente aplicados nos processos de melhoramento do gênero Urochloa. O pacote R de análise bibliométrica, Bibliometrix, processou os dados obtidos nas buscas. O estudo indicou que o Brasil é o país com maior número de publicações relacionadas ao gênero. Os marcadores moleculares mais utilizados são os microssatélites, RAPDs e SNPs, que foram ideais para a construção de mapas de ligação e estudos de diferenciação e diversidade genética. Ficou evidente a necessidade de ampliação dos estudos genéticos em outras espécies de Urochloa, de forma a facilitar a seleção de caracteres de interesse e o direcionamento de cruzamentos que garantam a formação de genótipos com maior variabilidade genética para exploração nos programas de melhoramento.</summary>
    <dc:date>2026-01-01T00:00:00Z</dc:date>
  </entry>
  <entry>
    <title>Evaluation of propidium monoazide for 16S ribosomal RNA metabarcoding assessment of microbial communities in 60-day ripened raw goat milk cheese.</title>
    <link rel="alternate" href="https://www.alice.cnptia.embrapa.br/alice/handle/doc/1188204" />
    <author>
      <name>FEITOZA, S. N. P.</name>
    </author>
    <author>
      <name>LIMA, L. A. de</name>
    </author>
    <author>
      <name>SARAIVA, C. A. S.</name>
    </author>
    <author>
      <name>DIAS, W. da S.</name>
    </author>
    <author>
      <name>MEDEIROS, A. B. A. de</name>
    </author>
    <author>
      <name>FERNANDES, A. C. de C.</name>
    </author>
    <author>
      <name>HEINEMANN, M. B.</name>
    </author>
    <author>
      <name>SOUZA, F. N. de</name>
    </author>
    <author>
      <name>FELISBERTO, N. R. de O.</name>
    </author>
    <author>
      <name>LEMOS, M. L. P.</name>
    </author>
    <author>
      <name>EGITO, A. S. do</name>
    </author>
    <author>
      <name>OLIVEIRA, C. J. B. de</name>
    </author>
    <id>https://www.alice.cnptia.embrapa.br/alice/handle/doc/1188204</id>
    <updated>2026-07-12T16:47:34Z</updated>
    <published>2026-01-01T00:00:00Z</published>
    <summary type="text">Título: Evaluation of propidium monoazide for 16S ribosomal RNA metabarcoding assessment of microbial communities in 60-day ripened raw goat milk cheese.
Autoria: FEITOZA, S. N. P.; LIMA, L. A. de; SARAIVA, C. A. S.; DIAS, W. da S.; MEDEIROS, A. B. A. de; FERNANDES, A. C. de C.; HEINEMANN, M. B.; SOUZA, F. N. de; FELISBERTO, N. R. de O.; LEMOS, M. L. P.; EGITO, A. S. do; OLIVEIRA, C. J. B. de
Conteúdo: Abstract: Cheese ripening is a complex microbial process marked by significant shifts in microbial composition. Considering that propidium monoazide (PMA) depletes DNA from nonviable cells, we hypothesized that PMA treatment of cheese samples could affect the microbiota characterization of 60-d-ripened raw goat curd cheese by 16S rRNA metabarcoding sequencing. After ripening, PMA-treated and nontreated (control) samples from the same cheese units were processed for DNA extraction, library preparation, and 16S rRNA metabarcoding sequencing on an Illumina MiSeq platform. Downstream bioinformatic analyses for microbial diversity assessment were performed using QIIME 2 and the phyloseq package in R. Statistical analyses included permutational multivariate analysis of variance (PERMANOVA), Wilcoxon tests, and linear discriminant analysis effect size (LEfSe). No significant differences were observed in either α or β diversity metrics between PMA-treated and nontreated samples. However, PMA treatment significantly reduced the abundance of farm environment–associated Dickeya and Pectobacteriaceae taxa in cheese samples, thus improving the accuracy of determining the cheese microbial structure using next-generation sequencing technologies. Further longitudinal studies focusing on different sampling periods during ripening, as well as other cheese types, may shed light on the potential benefits of using PMA for improving the accuracy of cheese microbial community characterization by next-generation sequencing. Summary: This study evaluated whether propidium monoazide (PMA) treatment affects the characterization of microbial communities in 60-day-ripened raw goat cheese using 16S ribosomal RNA (rRNA) metabarcoding. The PMA selectively depletes DNA from nonviable cells, potentially providing a more accurate representation of living microorganisms. Paired samples (PMA-treated and nontreated controls) from the same cheese units were analyzed using Illumina MiSeq sequencing, with downstream analyses performed in QIIME 2 and R. Results showed no significant differences in alpha or beta diversity metrics between treatments, indicating that PMA did not alter the overall microbial community structure. However, PMA treatment significantly reduced the abundance of farm environment-associated taxa, specifically Dickeya and Pectobacteriaceae, suggesting these organisms were predominantly nonviable with residual DNA persisting in the cheese matrix. This demonstrates that PMA pretreatment improves the accuracy of cheese microbiome characterization by filtering dead cell DNA from environmental contaminants, providing clearer insights into viable microbial communities during cheese ripening.</summary>
    <dc:date>2026-01-01T00:00:00Z</dc:date>
  </entry>
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