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Registro Completo |
Biblioteca(s): |
Embrapa Cerrados. |
Data corrente: |
25/09/1998 |
Data da última atualização: |
25/09/1998 |
Autoria: |
FONSECA, C. L. |
Título: |
Breeding for neutral detergent-soluble fiber and associations among forage quality traits, vigor, and disease resistance in alfafa. |
Ano de publicação: |
1998 |
Fonte/Imprenta: |
[Ithaca]: Cornell University, 1998. |
Páginas: |
123p. |
Idioma: |
Inglês |
Notas: |
PhD Dissertation. |
Conteúdo: |
Little is known about breeding for neutral detergent-soluble fiber (NDSF) and about the genetic relationship among diseases, quality traits, and vigor in alfalfa (Medicago sativa L.). We conducted a study to determine the potencial use of near infrared reflectance spectroscopy (NIRS) to predict NDSF concentration, mostly pectin in alfalfa, and to estimate heritability and expected gains from selection for NDSF concentration. Data were collected from herbage harvested three times in 1996 and twice in 1997 from two alfalfa half-sib (HS) progeny tests. Initially, a comparison between 90 and 80% ethanol extractions was made for NIRS calibration using samples from the second harves, 1996. Both 90 and 80% ethanol extraction was used to assay all of the remaining samples. The calibration equation standard errors for predicting NDSF from individual harvest were small, ranging from 4.71 to 7.54 g kg 1-. Squared coefficients of multiple determination (R) ranged from 0.72 to 0.97. Near infrared reflectance spectroscopy (NIRS) can be a useful tool quickly evaluate NDSF concentration from a large number of forage samples. Selection of parent genotypes with high NDSF concentrations based on HS family evaluation and NIRS equations may be effective. In a separate study, the same populations were evaluated for resistance to five diseases, nutritional quality, and vigor. Simple, phenotypic, and additive genetic correlation coefficients were estimated for all possible combinations of traits from independent experiments for each dissease and quality trait. Selection for bacterial wilt resistance in some populations may have a positive impact on Fusarium wilt resistance. Selection for higher NDSF concentrations may decrease the concentrations of the other cell-wall fiber components and increase true in vitro dry matter digestibility. Selections for lower fiber and/or higher crude protein concentrations may decrese vigor. Significant correlations between quality traits, disease resistances, and vigor were not of sufficient magnitude to adversely affect the improvement of these traits. Direct selection for all traits, except for phytophthora root rot, based on HS progeny tests, may be effective for both populations. MenosLittle is known about breeding for neutral detergent-soluble fiber (NDSF) and about the genetic relationship among diseases, quality traits, and vigor in alfalfa (Medicago sativa L.). We conducted a study to determine the potencial use of near infrared reflectance spectroscopy (NIRS) to predict NDSF concentration, mostly pectin in alfalfa, and to estimate heritability and expected gains from selection for NDSF concentration. Data were collected from herbage harvested three times in 1996 and twice in 1997 from two alfalfa half-sib (HS) progeny tests. Initially, a comparison between 90 and 80% ethanol extractions was made for NIRS calibration using samples from the second harves, 1996. Both 90 and 80% ethanol extraction was used to assay all of the remaining samples. The calibration equation standard errors for predicting NDSF from individual harvest were small, ranging from 4.71 to 7.54 g kg 1-. Squared coefficients of multiple determination (R) ranged from 0.72 to 0.97. Near infrared reflectance spectroscopy (NIRS) can be a useful tool quickly evaluate NDSF concentration from a large number of forage samples. Selection of parent genotypes with high NDSF concentrations based on HS family evaluation and NIRS equations may be effective. In a separate study, the same populations were evaluated for resistance to five diseases, nutritional quality, and vigor. Simple, phenotypic, and additive genetic correlation coefficients were estimated for all possible combinations of traits fr... Mostrar Tudo |
Palavras-Chave: |
Anthracnosis; Bacterioses; Correlacao genetica; Espectrofotometro infra-vermelho; Fibres; Fungal diseases; Herdabilidade; Infrared spectrophotometry; Lignins; Murcha de verticilium; NIRS; Phenotypes; Phytophtora; Surface active agents. |
Thesagro: |
Alfafa; Antracnose; Detergente; Fenótipo; Fibra; Fungo; Fusarium; Lignina; Medicago Sativa; Melhoramento Genético Vegetal; Murcha Bacteriana; Murcha de Fusarium; Pectina; Podridão da Raiz; Solubilidade; Verticillium. |
Thesaurus Nal: |
fungi; genetic correlation; heritability; pectins; plant breeding; solubility. |
Categoria do assunto: |
-- |
Marc: |
LEADER 03732nam a2200565 a 4500 001 1562965 005 1998-09-25 008 1998 bl uuuu m 00u1 u #d 100 1 $aFONSECA, C. L. 245 $aBreeding for neutral detergent-soluble fiber and associations among forage quality traits, vigor, and disease resistance in alfafa. 260 $a[Ithaca]: Cornell University$c1998 300 $a123p. 500 $aPhD Dissertation. 520 $aLittle is known about breeding for neutral detergent-soluble fiber (NDSF) and about the genetic relationship among diseases, quality traits, and vigor in alfalfa (Medicago sativa L.). We conducted a study to determine the potencial use of near infrared reflectance spectroscopy (NIRS) to predict NDSF concentration, mostly pectin in alfalfa, and to estimate heritability and expected gains from selection for NDSF concentration. Data were collected from herbage harvested three times in 1996 and twice in 1997 from two alfalfa half-sib (HS) progeny tests. Initially, a comparison between 90 and 80% ethanol extractions was made for NIRS calibration using samples from the second harves, 1996. Both 90 and 80% ethanol extraction was used to assay all of the remaining samples. The calibration equation standard errors for predicting NDSF from individual harvest were small, ranging from 4.71 to 7.54 g kg 1-. Squared coefficients of multiple determination (R) ranged from 0.72 to 0.97. Near infrared reflectance spectroscopy (NIRS) can be a useful tool quickly evaluate NDSF concentration from a large number of forage samples. Selection of parent genotypes with high NDSF concentrations based on HS family evaluation and NIRS equations may be effective. In a separate study, the same populations were evaluated for resistance to five diseases, nutritional quality, and vigor. Simple, phenotypic, and additive genetic correlation coefficients were estimated for all possible combinations of traits from independent experiments for each dissease and quality trait. Selection for bacterial wilt resistance in some populations may have a positive impact on Fusarium wilt resistance. Selection for higher NDSF concentrations may decrease the concentrations of the other cell-wall fiber components and increase true in vitro dry matter digestibility. Selections for lower fiber and/or higher crude protein concentrations may decrese vigor. Significant correlations between quality traits, disease resistances, and vigor were not of sufficient magnitude to adversely affect the improvement of these traits. Direct selection for all traits, except for phytophthora root rot, based on HS progeny tests, may be effective for both populations. 650 $afungi 650 $agenetic correlation 650 $aheritability 650 $apectins 650 $aplant breeding 650 $asolubility 650 $aAlfafa 650 $aAntracnose 650 $aDetergente 650 $aFenótipo 650 $aFibra 650 $aFungo 650 $aFusarium 650 $aLignina 650 $aMedicago Sativa 650 $aMelhoramento Genético Vegetal 650 $aMurcha Bacteriana 650 $aMurcha de Fusarium 650 $aPectina 650 $aPodridão da Raiz 650 $aSolubilidade 650 $aVerticillium 653 $aAnthracnosis 653 $aBacterioses 653 $aCorrelacao genetica 653 $aEspectrofotometro infra-vermelho 653 $aFibres 653 $aFungal diseases 653 $aHerdabilidade 653 $aInfrared spectrophotometry 653 $aLignins 653 $aMurcha de verticilium 653 $aNIRS 653 $aPhenotypes 653 $aPhytophtora 653 $aSurface active agents
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Registro Completo
Biblioteca(s): |
Embrapa Soja. |
Data corrente: |
27/02/2008 |
Data da última atualização: |
27/02/2008 |
Tipo da produção científica: |
Resumo em Anais de Congresso |
Circulação/Nível: |
-- - -- |
Autoria: |
PANIZZI, A. R.; SILVA, F. A. C. |
Título: |
Cotton balls as an oviposition substrate for laboratory rearing of phytophagous stink bugs (Heteroptera: Pentatomidae). |
Ano de publicação: |
2007 |
Fonte/Imprenta: |
In: ANNUAL MEETING OF THE ENTOMOLOGICAL SOCIETY OF AMERICA, 55., 2007, San Diego. [Abstracts...]. Lanham: Entomological Society of America, 2007. p. 107. |
Idioma: |
Inglês |
Categoria do assunto: |
-- |
Marc: |
LEADER 00512naa a2200121 a 4500 001 1470483 005 2008-02-27 008 2007 bl --- 0-- u #d 100 1 $aPANIZZI, A. R. 245 $aCotton balls as an oviposition substrate for laboratory rearing of phytophagous stink bugs (Heteroptera$bPentatomidae). 260 $c2007 700 1 $aSILVA, F. A. C. 773 $tIn: ANNUAL MEETING OF THE ENTOMOLOGICAL SOCIETY OF AMERICA, 55., 2007, San Diego. [Abstracts...]. Lanham: Entomological Society of America, 2007. p. 107.
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