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| 12. |  | FONTES, P. C. R.; SAMPAIO, R. A.; FINGER, F. L. Fruit size, mineral composition and quality of trickle-irrigated tomatoes as affected by potassium rates. Pesquisa Agropecuária Brasileira, Brasília, DF, v. 35, n. 1, p. 21-25, jan. 2000. Título em português: Tamanho, composição mineral e qualidade de frutos de tomateiro irrigado por gotejamento em razão de doses de potássio.| Biblioteca(s): Embrapa Hortaliças; Embrapa Unidades Centrais. |
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| 19. | | SAMPAIO, R. A.; ALMEIDA, M. T.; COSTA, L. M. da. Efeito do gesso sobre as propriedades fisícas de um solo salino-sódico, sob compactação. IN: CONGRESSO BRASILEIRO DE CIÊNÇIA DO SOLO, 25., 1995, Viçosa, Resumos expandidos. Viçosa: UFV, 1995. v.1, p. 177-179.| Biblioteca(s): Embrapa Tabuleiros Costeiros. |
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Registro Completo
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Biblioteca(s): |
Embrapa Cerrados. |
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Data corrente: |
16/06/2000 |
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Data da última atualização: |
16/06/2000 |
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Autoria: |
FONSECA, C. E. L.; HANSEN, J. L.; THOMAS, E. M.; PELL, A. N.; VIANDS, D. R. |
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Título: |
Near infrared spectroscopy prediction and heritability of neutral detergent-soluble fiber in alfalfa. |
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Ano de publicação: |
1999 |
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Fonte/Imprenta: |
Crop Science, Madison, v.39, n.5, p.1265-1270, Sep./Oct. 1999. |
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Idioma: |
Inglês |
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Conteúdo: |
Increasing neutral detergent-soluble fiber (NDSF) concentration has been considered a strategy for breeding alfalfa (Medicago sativa L.) with improved quality. Pectin is the main component of NDSF and is highly digestible, but the assay for NDSF is time-consuming. The objectives were (i) to determine the potential use of near infrared reflectance spectroscopy (NIRS) to predict NDSF concentration in alfalfa and (ii) to estimate NDSF heritability and gain from selection. Herbage was sampled five times across 2 yr from two populations of half-sib (HS) progeny tested at Ithaca, NY. Calibration equations were developed by multiple linear regression of laboratory values of NDSF on NIRS spectra. Samples from one harvest were assayed twice to compare extraction methods. Means of NDSF from 90- and 80%- ethanol extractions were 213.1= 7.21 and 179.5= 5.89 g kg-1, respectively. Assay standard deviations were low for both ethanol concentrations. Because a better calibration equations was obtained with the 80% -ethanol assay, all remaining samples were assayed by that technique. Standard errors of calibration were small, ranging from 4.71 to 7.54 g kg-1. Coefficients of multiple determination (R elevado a 2) ranged from 0.72 to 0.97. Most heritability estimates for NDSF were significantly greater than zero, ranging from -0.03 = 0.20 to 0.56 =0.17 and averaging 0.41. Expected gain from selection of parents based on HS progeny ranged from 4.6 to 19.0 g kg-1 and averaged 10.3 g kg-1. Selecting parents with higher NDSF concentrations predicted by NIRS evaluations of HS progenies may improve forage quality of alfalfa. MenosIncreasing neutral detergent-soluble fiber (NDSF) concentration has been considered a strategy for breeding alfalfa (Medicago sativa L.) with improved quality. Pectin is the main component of NDSF and is highly digestible, but the assay for NDSF is time-consuming. The objectives were (i) to determine the potential use of near infrared reflectance spectroscopy (NIRS) to predict NDSF concentration in alfalfa and (ii) to estimate NDSF heritability and gain from selection. Herbage was sampled five times across 2 yr from two populations of half-sib (HS) progeny tested at Ithaca, NY. Calibration equations were developed by multiple linear regression of laboratory values of NDSF on NIRS spectra. Samples from one harvest were assayed twice to compare extraction methods. Means of NDSF from 90- and 80%- ethanol extractions were 213.1= 7.21 and 179.5= 5.89 g kg-1, respectively. Assay standard deviations were low for both ethanol concentrations. Because a better calibration equations was obtained with the 80% -ethanol assay, all remaining samples were assayed by that technique. Standard errors of calibration were small, ranging from 4.71 to 7.54 g kg-1. Coefficients of multiple determination (R elevado a 2) ranged from 0.72 to 0.97. Most heritability estimates for NDSF were significantly greater than zero, ranging from -0.03 = 0.20 to 0.56 =0.17 and averaging 0.41. Expected gain from selection of parents based on HS progeny ranged from 4.6 to 19.0 g kg-1 and averaged 10.3 g kg-1. Select... Mostrar Tudo |
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Palavras-Chave: |
Fibres; Herdabilidade; Surface active agents. |
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Thesagro: |
Alfafa; Cerrado; Detergente; Fibra; Medicago Sativa; Solubilidade. |
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Thesaurus NAL: |
heritability; solubility. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 02440naa a2200301 a 4500
001 1546241
005 2000-06-16
008 1999 bl --- 0-- u #d
100 1 $aFONSECA, C. E. L.
245 $aNear infrared spectroscopy prediction and heritability of neutral detergent-soluble fiber in alfalfa.
260 $c1999
520 $aIncreasing neutral detergent-soluble fiber (NDSF) concentration has been considered a strategy for breeding alfalfa (Medicago sativa L.) with improved quality. Pectin is the main component of NDSF and is highly digestible, but the assay for NDSF is time-consuming. The objectives were (i) to determine the potential use of near infrared reflectance spectroscopy (NIRS) to predict NDSF concentration in alfalfa and (ii) to estimate NDSF heritability and gain from selection. Herbage was sampled five times across 2 yr from two populations of half-sib (HS) progeny tested at Ithaca, NY. Calibration equations were developed by multiple linear regression of laboratory values of NDSF on NIRS spectra. Samples from one harvest were assayed twice to compare extraction methods. Means of NDSF from 90- and 80%- ethanol extractions were 213.1= 7.21 and 179.5= 5.89 g kg-1, respectively. Assay standard deviations were low for both ethanol concentrations. Because a better calibration equations was obtained with the 80% -ethanol assay, all remaining samples were assayed by that technique. Standard errors of calibration were small, ranging from 4.71 to 7.54 g kg-1. Coefficients of multiple determination (R elevado a 2) ranged from 0.72 to 0.97. Most heritability estimates for NDSF were significantly greater than zero, ranging from -0.03 = 0.20 to 0.56 =0.17 and averaging 0.41. Expected gain from selection of parents based on HS progeny ranged from 4.6 to 19.0 g kg-1 and averaged 10.3 g kg-1. Selecting parents with higher NDSF concentrations predicted by NIRS evaluations of HS progenies may improve forage quality of alfalfa.
650 $aheritability
650 $asolubility
650 $aAlfafa
650 $aCerrado
650 $aDetergente
650 $aFibra
650 $aMedicago Sativa
650 $aSolubilidade
653 $aFibres
653 $aHerdabilidade
653 $aSurface active agents
700 1 $aHANSEN, J. L.
700 1 $aTHOMAS, E. M.
700 1 $aPELL, A. N.
700 1 $aVIANDS, D. R.
773 $tCrop Science, Madison$gv.39, n.5, p.1265-1270, Sep./Oct. 1999.
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