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Registro Completo |
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Biblioteca(s): |
Embrapa Cerrados. |
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Data corrente: |
08/06/2000 |
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Data da última atualização: |
08/06/2000 |
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Autoria: |
AMARAL, J. L. do; VILLAR, V. do A. B. |
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Título: |
Avaliacao das perdas do valor nutritivo e da resistencia de quatro gramineas, quanto a acao do percevejo castanho das raizes (Scaptocoris castanea Perty, 1830). |
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Ano de publicação: |
1999 |
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Fonte/Imprenta: |
In: WORKSHOP SOBRE PERCEVEJO CASTANHO DA RAIZ, 1999, Londrina, PR. Ata e resumos. Londrina: Embrapa Soja, 1999. |
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Páginas: |
p.48-49. |
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Série: |
(Embrapa Soja. Documentos, 127). |
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Idioma: |
Português |
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Palavras-Chave: |
Percevejo castanho das raizes; Pests of plants. |
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Thesagro: |
Cerrado; Gramínea; Scaptocoris Castanea; Valor Nutritivo. |
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Thesaurus Nal: |
grasses; nutritive value. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 00844naa a2200241 a 4500
001 1555255
005 2000-06-08
008 1999 bl uuuu u00u1 u #d
100 1 $aAMARAL, J. L. do
245 $aAvaliacao das perdas do valor nutritivo e da resistencia de quatro gramineas, quanto a acao do percevejo castanho das raizes (Scaptocoris castanea Perty, 1830).
260 $c1999
300 $ap.48-49.
490 $a(Embrapa Soja. Documentos, 127).
650 $agrasses
650 $anutritive value
650 $aCerrado
650 $aGramínea
650 $aScaptocoris Castanea
650 $aValor Nutritivo
653 $aPercevejo castanho das raizes
653 $aPests of plants
700 1 $aVILLAR, V. do A. B.
773 $tIn: WORKSHOP SOBRE PERCEVEJO CASTANHO DA RAIZ, 1999, Londrina, PR. Ata e resumos. Londrina: Embrapa Soja, 1999.
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Embrapa Cerrados (CPAC) |
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 | Acesso ao texto completo restrito à biblioteca da Embrapa Soja. Para informações adicionais entre em contato com valeria.cardoso@embrapa.br. |
Registro Completo
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Biblioteca(s): |
Embrapa Soja. |
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Data corrente: |
10/01/2006 |
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Data da última atualização: |
11/01/2006 |
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Autoria: |
ASSUNÇÃO, M. S.; ATIBALENTJA, N.; NOEL, G. R. |
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Título: |
Soybean cyst nematode, Heterodera glycines, resistance genes in PI 89772 and PI 209332 soybean. |
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Ano de publicação: |
2004 |
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Fonte/Imprenta: |
Nematropica, Ft. Pierce, v. 34, n. 2, p. 165-181, 2004. |
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Idioma: |
Inglês |
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Conteúdo: |
The number of resistance genes in PI 89772 and PI 209332 conferring resistance to H. glycines race 3 is not well defined. Crosses of PI 89772 x 'Lee 68', PI 88788 x PI 89772, and 'Lee 68' x PI 209332 were made in the field and greenhouse. Several F1 and F2 families from each cross, 98 F3 families from cross PI 89772 x 'Lee 68', 74 F3 families from cross PI 88788 x PI 89772, and 80 F3 families from cross 'Lee 68' x PI 209332 were tested with an inbred line of H. glycines developed on PI 88788 to determine the leveI and inheritance of resistance. Approximately 8,000 individual plants growing in pots con- taining 200 cm3 of sterilized sand were inoculated with 4,000 eggs and J2/pot. Thirty days after inoculation the number of females that developed on each plant was determined. Cluster analysis revealed sets of families with a low mean number of females and low variance, intermediate means and high variance, and high means with a low variance, indicating F3 plants came from, respectively, homozygous resistant, heterozygous or segregating, and homozygous susceptible F2 plants. Thus, resistance classes were considered as quantitative parameters having different levels of resistance as opposed to only two classes, either resistant or susceptible. Chi-square analysis of segregation of phenotypic data indicated two genes confer resistance to face 3 of H. glycines. The three H. glycines-resistant parents have at least two genes that express resistance to H. glycines. One gene acts as a major gene (Rhg x) and the other a minor gene (Rhg y,) in conferring resistance of the parents PI 89772 (Rhg x1? Rhg x1?Rhg y1? Rhg y1?), PI 88788 (Rhg x2? Rhg x2? Rhg y2? Rhg y2?) and PI 209332 (Rhg x3? Rhg x3? Rhg y3? Rhg y3?) to H. glycines race 3. The same genes may occur in PI 209332 as in PI 89772, but support for this hypothesis must be obtained by studying the cross PI 209332 x PI 89772. The same major (Rhg x) and minor (Rhg y) genes occur in PI 89772 (Rhg x1? Rhg x1? Rhg y1? Rhg y1?) and PI 88788 (Rhg x2? Rhg x2? Rhg y2? Rhg y2?). The phenotypic ratios obtained in this research indicate that epistasis occurs between gene Rhg x and gene Rhg y. Results from this analysis indicated that the sensitivity of resistant genotypes to the environment is different from that of susceptible genotypes. In addition, a maternal effect was found for the inheritance of resistance of PI 88788 to H. glycines race 3, but not for PI 89772. MenosThe number of resistance genes in PI 89772 and PI 209332 conferring resistance to H. glycines race 3 is not well defined. Crosses of PI 89772 x 'Lee 68', PI 88788 x PI 89772, and 'Lee 68' x PI 209332 were made in the field and greenhouse. Several F1 and F2 families from each cross, 98 F3 families from cross PI 89772 x 'Lee 68', 74 F3 families from cross PI 88788 x PI 89772, and 80 F3 families from cross 'Lee 68' x PI 209332 were tested with an inbred line of H. glycines developed on PI 88788 to determine the leveI and inheritance of resistance. Approximately 8,000 individual plants growing in pots con- taining 200 cm3 of sterilized sand were inoculated with 4,000 eggs and J2/pot. Thirty days after inoculation the number of females that developed on each plant was determined. Cluster analysis revealed sets of families with a low mean number of females and low variance, intermediate means and high variance, and high means with a low variance, indicating F3 plants came from, respectively, homozygous resistant, heterozygous or segregating, and homozygous susceptible F2 plants. Thus, resistance classes were considered as quantitative parameters having different levels of resistance as opposed to only two classes, either resistant or susceptible. Chi-square analysis of segregation of phenotypic data indicated two genes confer resistance to face 3 of H. glycines. The three H. glycines-resistant parents have at least two genes that express resistance to H. glycines. One gene acts as... Mostrar Tudo |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 02880naa a2200145 a 4500
001 1468741
005 2006-01-11
008 2004 bl --- 0-- u #d
100 1 $aASSUNÇÃO, M. S.
245 $aSoybean cyst nematode, Heterodera glycines, resistance genes in PI 89772 and PI 209332 soybean.
260 $c2004
520 $aThe number of resistance genes in PI 89772 and PI 209332 conferring resistance to H. glycines race 3 is not well defined. Crosses of PI 89772 x 'Lee 68', PI 88788 x PI 89772, and 'Lee 68' x PI 209332 were made in the field and greenhouse. Several F1 and F2 families from each cross, 98 F3 families from cross PI 89772 x 'Lee 68', 74 F3 families from cross PI 88788 x PI 89772, and 80 F3 families from cross 'Lee 68' x PI 209332 were tested with an inbred line of H. glycines developed on PI 88788 to determine the leveI and inheritance of resistance. Approximately 8,000 individual plants growing in pots con- taining 200 cm3 of sterilized sand were inoculated with 4,000 eggs and J2/pot. Thirty days after inoculation the number of females that developed on each plant was determined. Cluster analysis revealed sets of families with a low mean number of females and low variance, intermediate means and high variance, and high means with a low variance, indicating F3 plants came from, respectively, homozygous resistant, heterozygous or segregating, and homozygous susceptible F2 plants. Thus, resistance classes were considered as quantitative parameters having different levels of resistance as opposed to only two classes, either resistant or susceptible. Chi-square analysis of segregation of phenotypic data indicated two genes confer resistance to face 3 of H. glycines. The three H. glycines-resistant parents have at least two genes that express resistance to H. glycines. One gene acts as a major gene (Rhg x) and the other a minor gene (Rhg y,) in conferring resistance of the parents PI 89772 (Rhg x1? Rhg x1?Rhg y1? Rhg y1?), PI 88788 (Rhg x2? Rhg x2? Rhg y2? Rhg y2?) and PI 209332 (Rhg x3? Rhg x3? Rhg y3? Rhg y3?) to H. glycines race 3. The same genes may occur in PI 209332 as in PI 89772, but support for this hypothesis must be obtained by studying the cross PI 209332 x PI 89772. The same major (Rhg x) and minor (Rhg y) genes occur in PI 89772 (Rhg x1? Rhg x1? Rhg y1? Rhg y1?) and PI 88788 (Rhg x2? Rhg x2? Rhg y2? Rhg y2?). The phenotypic ratios obtained in this research indicate that epistasis occurs between gene Rhg x and gene Rhg y. Results from this analysis indicated that the sensitivity of resistant genotypes to the environment is different from that of susceptible genotypes. In addition, a maternal effect was found for the inheritance of resistance of PI 88788 to H. glycines race 3, but not for PI 89772.
700 1 $aATIBALENTJA, N.
700 1 $aNOEL, G. R.
773 $tNematropica, Ft. Pierce$gv. 34, n. 2, p. 165-181, 2004.
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