Registro Completo |
Biblioteca(s): |
Embrapa Soja. |
Data corrente: |
27/04/1993 |
Data da última atualização: |
26/10/2004 |
Autoria: |
CREGAN, P. B.; KEYSER, H. H.; SADOWSKY, M. J. |
Título: |
The use of host X strain incompatibilities in soybean to restrict nodulation of indigenous strains of Bradyrhizobium japonicum. |
Ano de publicação: |
1989 |
Fonte/Imprenta: |
In: CONFERENCIA MUNDIAL DE INVESTIGACION EN SOJA, 4., 1989, Buenos Aires. Actas... Buenos Aires: AASOJA, 1989. |
Volume: |
t.3 |
Páginas: |
p.1131-1137. |
Idioma: |
Inglês |
Conteúdo: |
Host controlled incompatibility between a legume and its Rhizobium Bradyrhizobium microsymbiont consists of two basic types. The first is a nodulation defect in which nodule formation is abnormal or completely absent, and the second, occurs when nodulation is "norma;" but N2 fixation effectiveness is significantly reduced. Both types of incompatibilities can be exploited in soybean to reduce or eliminate nodulation by indigenous B. japonicum in favor of highly effectiv inoculant strains. Strains of serocluster 123 are important indigenous strains in U.S. soils, are highly competitive in nodule formation, and are characerized by mediocre N2 fixation effectveness. We have identified host-controlled strain-specific nodulation defects in theree different soybean genotypes that restrict nodulation by subgroups of serocluster 123. Between the theree, the nodulation of 17 of 20 serocluster 123 isolates is restricted. These defects may be combined in one genotype ot eliminate nodulation by a large portion of indigenous serocluster 123. An example of the second type of incompatibility occurs in glycine soja PI 468397 that nodulates, but fixes no N2. withs strain USDA 123. When grown in soybean-rhizobia free soil and inoculated with USDA 123 and the R. fedii strain USDA 193, 8% of the nodule formed by 468397 may be used as the source of a gene or genes or to condition exclusion of indigenous serocluster 123 strains and thereby allow nodulation by an inoculant carrying a strains(s) of R. fredii. MenosHost controlled incompatibility between a legume and its Rhizobium Bradyrhizobium microsymbiont consists of two basic types. The first is a nodulation defect in which nodule formation is abnormal or completely absent, and the second, occurs when nodulation is "norma;" but N2 fixation effectiveness is significantly reduced. Both types of incompatibilities can be exploited in soybean to reduce or eliminate nodulation by indigenous B. japonicum in favor of highly effectiv inoculant strains. Strains of serocluster 123 are important indigenous strains in U.S. soils, are highly competitive in nodule formation, and are characerized by mediocre N2 fixation effectveness. We have identified host-controlled strain-specific nodulation defects in theree different soybean genotypes that restrict nodulation by subgroups of serocluster 123. Between the theree, the nodulation of 17 of 20 serocluster 123 isolates is restricted. These defects may be combined in one genotype ot eliminate nodulation by a large portion of indigenous serocluster 123. An example of the second type of incompatibility occurs in glycine soja PI 468397 that nodulates, but fixes no N2. withs strain USDA 123. When grown in soybean-rhizobia free soil and inoculated with USDA 123 and the R. fedii strain USDA 193, 8% of the nodule formed by 468397 may be used as the source of a gene or genes or to condition exclusion of indigenous serocluster 123 strains and thereby allow nodulation by an inoculant carrying a strains(s) of... Mostrar Tudo |
Palavras-Chave: |
EUA; Fixacao; Fixation; Soybean; USA. |
Thesagro: |
Bradyrhizobium Japonicum; Nitrogênio; Nodulação; Rhizobium; Soja. |
Thesaurus Nal: |
nitrogen; nodulation. |
Categoria do assunto: |
-- |
Marc: |
LEADER 02395naa a2200313 a 4500 001 1452173 005 2004-10-26 008 1989 bl uuuu u00u1 u #d 100 1 $aCREGAN, P. B. 245 $aThe use of host X strain incompatibilities in soybean to restrict nodulation of indigenous strains of Bradyrhizobium japonicum. 260 $c1989 300 $ap.1131-1137. t.3 490 $vt.3 520 $aHost controlled incompatibility between a legume and its Rhizobium Bradyrhizobium microsymbiont consists of two basic types. The first is a nodulation defect in which nodule formation is abnormal or completely absent, and the second, occurs when nodulation is "norma;" but N2 fixation effectiveness is significantly reduced. Both types of incompatibilities can be exploited in soybean to reduce or eliminate nodulation by indigenous B. japonicum in favor of highly effectiv inoculant strains. Strains of serocluster 123 are important indigenous strains in U.S. soils, are highly competitive in nodule formation, and are characerized by mediocre N2 fixation effectveness. We have identified host-controlled strain-specific nodulation defects in theree different soybean genotypes that restrict nodulation by subgroups of serocluster 123. Between the theree, the nodulation of 17 of 20 serocluster 123 isolates is restricted. These defects may be combined in one genotype ot eliminate nodulation by a large portion of indigenous serocluster 123. An example of the second type of incompatibility occurs in glycine soja PI 468397 that nodulates, but fixes no N2. withs strain USDA 123. When grown in soybean-rhizobia free soil and inoculated with USDA 123 and the R. fedii strain USDA 193, 8% of the nodule formed by 468397 may be used as the source of a gene or genes or to condition exclusion of indigenous serocluster 123 strains and thereby allow nodulation by an inoculant carrying a strains(s) of R. fredii. 650 $anitrogen 650 $anodulation 650 $aBradyrhizobium Japonicum 650 $aNitrogênio 650 $aNodulação 650 $aRhizobium 650 $aSoja 653 $aEUA 653 $aFixacao 653 $aFixation 653 $aSoybean 653 $aUSA 700 1 $aKEYSER, H. H. 700 1 $aSADOWSKY, M. J. 773 $tIn: CONFERENCIA MUNDIAL DE INVESTIGACION EN SOJA, 4., 1989, Buenos Aires. Actas... Buenos Aires: AASOJA, 1989.
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Registro original: |
Embrapa Soja (CNPSO) |
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