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Registro Completo |
Biblioteca(s): |
Embrapa Caprinos e Ovinos. |
Data corrente: |
16/04/2024 |
Data da última atualização: |
16/04/2024 |
Tipo da produção científica: |
Artigo em Periódico Indexado |
Autoria: |
MENESES, A. J. G.; POMPEU, R. C. F. F.; SALLES, H. O.; COSTA, C. dos S.; ROGERIO, M. C. P.; ANDRADE, I. N. A. de; FURTADO, R. N.; MEDEIROS, A. N. de; PEREIRA, P. L.; CÂNDIDO, M. J. D. |
Afiliação: |
ABNER JOSÉ GIRÃO MENESES, INSTITUTO FEDERAL DE EDUCAÇÃO, CIÊNCIA E TECNOLOGIA DO CEARÁ; ROBERTO CLAUDIO FERNANDES F POMPEU, CNPC; HEVILA OLIVEIRA SALLES FIGUEIREDO, CNPC; CLÉSIO DOS SANTOS COSTA, UNIVERSIDADE FEDERAL DO CEARÁ; MARCOS CLAUDIO PINHEIRO ROGERIO, CNPC; IGO RENAN ALBUQUERQUE DE ANDRADE, INSTITUTO FEDERAL DE EDUCAÇÃO, CIÊNCIA E TECNOLOGIA DO CEARÁ; RAFAEL NOGUEIRA FURTADO, INSTITUTO FEDERAL DO PIAUÍ; ARIOSVALDO NUNES DE MEDEIROS, UNIVERSIDADE FEDERAL DO CEARÁ; PATRÍCIO LEANDRO PEREIRA, UNIVERSIDADE ESTADUAL DO VALE DO ACARAÚ; MAGNO JOSÉ DUARTE CÂNDIDO, UNIVERSIDADE FEDERAL DO CEARÁ. |
Título: |
Nutritional parameters and productive performance of grazing sheep using castor bean cake as supplement or fertilizer. |
Ano de publicação: |
2024 |
Fonte/Imprenta: |
Tropical Animal Health and Production, v. 53, n. 3, article 121, Apr. 2024. |
DOI: |
10.1007/s11250-024-03967-3 |
Idioma: |
Inglês |
Conteúdo: |
Abstract: The objective was to evaluate the effect of detoxified castor bean replacing soybean meal in the concentrate diet or as nitrogen organic fertilizer replacing urea on intake and nutrient digestibility, blood parameters and productive performance of sheep finished on irrigated Tamani grass pasture under continuous stocking and variable stocking rate. The treatments were two concentrate diets: standard (ground corn and soybean meal) and alternative diet (ground corn and detoxified castor bean cake), and two nitrogen fertilizers: chemical (urea) and organic (fresh castor bean cake). The randomized complete block design was used in a 2 × 2 factorial arrangement with four replications (500 m² paddocks). Four sheep (2 castrated males and 2 females) were distributed in each experimental unit, totaling 64 animals with an average initial weight of 19.42 ± 3.6 kg. No effects (P > 0.05) were observed on the variables inherent to the evaluation of the pasture. The average stocking rate (SR) among treatments was 85.50 sheep/ha, equivalent to 9.87 Animal Units (AU)/ha. The alternative diet presented lower dry matter digestibility (62.71%), with no negative effects on nutrient intake and kidney parameters. Animals fed the standard and alternative diet showed average daily gain of 103.75 and 86.76 g/day, respectively. A finishing period of up to 100 days is recommended for sheep selected for production systems in semi-arid regions managed intensively on pasture. Detoxified castor bean cake did not alter nutrient intake, liver and kidney parameters of the sheep and can be used in pasture-based sheep farming. MenosAbstract: The objective was to evaluate the effect of detoxified castor bean replacing soybean meal in the concentrate diet or as nitrogen organic fertilizer replacing urea on intake and nutrient digestibility, blood parameters and productive performance of sheep finished on irrigated Tamani grass pasture under continuous stocking and variable stocking rate. The treatments were two concentrate diets: standard (ground corn and soybean meal) and alternative diet (ground corn and detoxified castor bean cake), and two nitrogen fertilizers: chemical (urea) and organic (fresh castor bean cake). The randomized complete block design was used in a 2 × 2 factorial arrangement with four replications (500 m² paddocks). Four sheep (2 castrated males and 2 females) were distributed in each experimental unit, totaling 64 animals with an average initial weight of 19.42 ± 3.6 kg. No effects (P > 0.05) were observed on the variables inherent to the evaluation of the pasture. The average stocking rate (SR) among treatments was 85.50 sheep/ha, equivalent to 9.87 Animal Units (AU)/ha. The alternative diet presented lower dry matter digestibility (62.71%), with no negative effects on nutrient intake and kidney parameters. Animals fed the standard and alternative diet showed average daily gain of 103.75 and 86.76 g/day, respectively. A finishing period of up to 100 days is recommended for sheep selected for production systems in semi-arid regions managed intensively on pasture. Detoxified castor b... Mostrar Tudo |
Palavras-Chave: |
Aspartate aminotransferase; Farelo de soja; Santa Inês. |
Thesagro: |
Alimento Para Animal; Caatinga; Glycine Max; Nutrição Animal; Ovino; Ricinus Communis. |
Thesaurus Nal: |
Brazil; Dietary supplements; Females; Nitrogen fertilizers; Ruminant nutrition; Semiarid zones; Sheep feeding; Urea; Weight gain. |
Categoria do assunto: |
-- |
Marc: |
LEADER 02972naa a2200457 a 4500 001 2163638 005 2024-04-16 008 2024 bl uuuu u00u1 u #d 024 7 $a10.1007/s11250-024-03967-3$2DOI 100 1 $aMENESES, A. J. G. 245 $aNutritional parameters and productive performance of grazing sheep using castor bean cake as supplement or fertilizer.$h[electronic resource] 260 $c2024 520 $aAbstract: The objective was to evaluate the effect of detoxified castor bean replacing soybean meal in the concentrate diet or as nitrogen organic fertilizer replacing urea on intake and nutrient digestibility, blood parameters and productive performance of sheep finished on irrigated Tamani grass pasture under continuous stocking and variable stocking rate. The treatments were two concentrate diets: standard (ground corn and soybean meal) and alternative diet (ground corn and detoxified castor bean cake), and two nitrogen fertilizers: chemical (urea) and organic (fresh castor bean cake). The randomized complete block design was used in a 2 × 2 factorial arrangement with four replications (500 m² paddocks). Four sheep (2 castrated males and 2 females) were distributed in each experimental unit, totaling 64 animals with an average initial weight of 19.42 ± 3.6 kg. No effects (P > 0.05) were observed on the variables inherent to the evaluation of the pasture. The average stocking rate (SR) among treatments was 85.50 sheep/ha, equivalent to 9.87 Animal Units (AU)/ha. The alternative diet presented lower dry matter digestibility (62.71%), with no negative effects on nutrient intake and kidney parameters. Animals fed the standard and alternative diet showed average daily gain of 103.75 and 86.76 g/day, respectively. A finishing period of up to 100 days is recommended for sheep selected for production systems in semi-arid regions managed intensively on pasture. Detoxified castor bean cake did not alter nutrient intake, liver and kidney parameters of the sheep and can be used in pasture-based sheep farming. 650 $aBrazil 650 $aDietary supplements 650 $aFemales 650 $aNitrogen fertilizers 650 $aRuminant nutrition 650 $aSemiarid zones 650 $aSheep feeding 650 $aUrea 650 $aWeight gain 650 $aAlimento Para Animal 650 $aCaatinga 650 $aGlycine Max 650 $aNutrição Animal 650 $aOvino 650 $aRicinus Communis 653 $aAspartate aminotransferase 653 $aFarelo de soja 653 $aSanta Inês 700 1 $aPOMPEU, R. C. F. F. 700 1 $aSALLES, H. O. 700 1 $aCOSTA, C. dos S. 700 1 $aROGERIO, M. C. P. 700 1 $aANDRADE, I. N. A. de 700 1 $aFURTADO, R. N. 700 1 $aMEDEIROS, A. N. de 700 1 $aPEREIRA, P. L. 700 1 $aCÂNDIDO, M. J. D. 773 $tTropical Animal Health and Production$gv. 53, n. 3, article 121, Apr. 2024.
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Embrapa Caprinos e Ovinos (CNPC) |
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Biblioteca(s): |
Embrapa Milho e Sorgo. |
Data corrente: |
02/04/2002 |
Data da última atualização: |
19/10/2023 |
Autoria: |
GUIMARAES, P. E. de O. |
Afiliação: |
PAULO EVARISTO DE O GUIMARAES, CNPMS. |
Título: |
Effects of a long-term recurrent selection program on the genetic structure of the BSSS maize population. |
Ano de publicação: |
2001 |
Fonte/Imprenta: |
2001. |
Páginas: |
99 p. |
Idioma: |
Inglês |
Notas: |
Tese (Doutorado) - Iowa State University, Ames. |
Conteúdo: |
Evaluating of Recurrent Selection (RS) programs can lead to increase knowledge of methods, populations, and traits and give support for better management of breeding programs. The objective herein was to evaluate the effects of seven cycles of half-sib selection followed by seven cycles of S2 selection on the genetic structure of BSSS maize population. Individuals from BSSSP (progenitor lines), BS13(S)CO (original S2 selection), and BS13(S)C7 (7th S2 cycle) cycles were genotyped based on a sample of 105 RFLP loci. Measures of genetic variation within (expected heterozygosity, number of allelles, average frequency of the most common allele, and proportion of polymorphic loci) and among (Principal Component Analysis and Nei's genetic distance, NGD) cycles of selection indicated BSSSP has a considerable genetic variability, substantial loss a variation and increase of divergence over the cycles of selection, greatest loss of diversity occurred during the HS selection program, future cycles of RS are predicted to have narrow genetic variation, and low average effective population size was an important factor in loss of genetic variation. Changes in allele frequencies for about 30% of the loci cannot be explained by genetic drift alone, suggesting that selection also was an important factor of variation. The majority of loci in C0 and C7 were in H-W equilibrium. Progenitor lines Illinois Hy had a lower NGD to C0 and C7 and five of its unique had frequencies significantly increased in later generations, indicating a selective advantage over the cycles of RS. Hybrid Hy x LE 23 showed the lowest NGD to C0 and C7 populations. NGD among parental lines was not a good predictor of single-crosses yield performance. A founder effect observed herein may explain partially reduced genetic gains during the S2-selection period reported in other studies. Limited RFLP diversity in BS13(S)C7 suggests this population may not have enough genetic variability to sustain significant long-term genetic gains per se for grain yield. RFLP data were useful tools to evaluate this RS program. However, much more information could be obtained about recurrent selection programs by integrating of molecular (a standard set of marker loci) and phenotypic data. MenosEvaluating of Recurrent Selection (RS) programs can lead to increase knowledge of methods, populations, and traits and give support for better management of breeding programs. The objective herein was to evaluate the effects of seven cycles of half-sib selection followed by seven cycles of S2 selection on the genetic structure of BSSS maize population. Individuals from BSSSP (progenitor lines), BS13(S)CO (original S2 selection), and BS13(S)C7 (7th S2 cycle) cycles were genotyped based on a sample of 105 RFLP loci. Measures of genetic variation within (expected heterozygosity, number of allelles, average frequency of the most common allele, and proportion of polymorphic loci) and among (Principal Component Analysis and Nei's genetic distance, NGD) cycles of selection indicated BSSSP has a considerable genetic variability, substantial loss a variation and increase of divergence over the cycles of selection, greatest loss of diversity occurred during the HS selection program, future cycles of RS are predicted to have narrow genetic variation, and low average effective population size was an important factor in loss of genetic variation. Changes in allele frequencies for about 30% of the loci cannot be explained by genetic drift alone, suggesting that selection also was an important factor of variation. The majority of loci in C0 and C7 were in H-W equilibrium. Progenitor lines Illinois Hy had a lower NGD to C0 and C7 and five of its unique had frequencies significantly increase... Mostrar Tudo |
Palavras-Chave: |
Maize. |
Thesagro: |
Melhoramento; Milho; Zea Mays. |
Thesaurus NAL: |
breeding. |
Categoria do assunto: |
-- |
URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/90316/1/T-Paulo-Evaristo.pdf
|
Marc: |
LEADER 02820nam a2200193 a 4500 001 1485209 005 2023-10-19 008 2001 bl uuuu m 00u1 u #d 100 1 $aGUIMARAES, P. E. de O. 245 $aEffects of a long-term recurrent selection program on the genetic structure of the BSSS maize population.$h[electronic resource] 260 $a2001.$c2001 300 $a99 p. 500 $aTese (Doutorado) - Iowa State University, Ames. 520 $aEvaluating of Recurrent Selection (RS) programs can lead to increase knowledge of methods, populations, and traits and give support for better management of breeding programs. The objective herein was to evaluate the effects of seven cycles of half-sib selection followed by seven cycles of S2 selection on the genetic structure of BSSS maize population. Individuals from BSSSP (progenitor lines), BS13(S)CO (original S2 selection), and BS13(S)C7 (7th S2 cycle) cycles were genotyped based on a sample of 105 RFLP loci. Measures of genetic variation within (expected heterozygosity, number of allelles, average frequency of the most common allele, and proportion of polymorphic loci) and among (Principal Component Analysis and Nei's genetic distance, NGD) cycles of selection indicated BSSSP has a considerable genetic variability, substantial loss a variation and increase of divergence over the cycles of selection, greatest loss of diversity occurred during the HS selection program, future cycles of RS are predicted to have narrow genetic variation, and low average effective population size was an important factor in loss of genetic variation. Changes in allele frequencies for about 30% of the loci cannot be explained by genetic drift alone, suggesting that selection also was an important factor of variation. The majority of loci in C0 and C7 were in H-W equilibrium. Progenitor lines Illinois Hy had a lower NGD to C0 and C7 and five of its unique had frequencies significantly increased in later generations, indicating a selective advantage over the cycles of RS. Hybrid Hy x LE 23 showed the lowest NGD to C0 and C7 populations. NGD among parental lines was not a good predictor of single-crosses yield performance. A founder effect observed herein may explain partially reduced genetic gains during the S2-selection period reported in other studies. Limited RFLP diversity in BS13(S)C7 suggests this population may not have enough genetic variability to sustain significant long-term genetic gains per se for grain yield. RFLP data were useful tools to evaluate this RS program. However, much more information could be obtained about recurrent selection programs by integrating of molecular (a standard set of marker loci) and phenotypic data. 650 $abreeding 650 $aMelhoramento 650 $aMilho 650 $aZea Mays 653 $aMaize
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