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Registro Completo |
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Biblioteca(s): |
Embrapa Pantanal. |
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Data corrente: |
25/07/1995 |
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Data da última atualização: |
25/07/1995 |
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Autoria: |
HACKER, J. B. |
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Título: |
The genetic relationship between the digestibility of leaf, stem and whole plant in Setaria. |
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Ano de publicação: |
1974 |
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Fonte/Imprenta: |
Australian Journal of the Agricultural Research, v.25, p.401-406, 1974. |
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Idioma: |
Inglês |
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Conteúdo: |
The genetic interrelationships of in vitro dry matter of whole plant (DMDwp), leaf (DMDl), stem (DMDs) and terminal two leaf (DMD2l) fractions were investigated in 4-week regrowth of 21 tetraploid clones of Setaria anceps and 14 hexaploid clones of Setaria trinervia. There were significant differences between genotypes of more than eight digestibility units for all fractions, and for all fractions significant positive correlations were obtained between genotype performance at successive harvests. Genotypic and phenotypic correlations between leaf ans stem digestibility were mainly positive, but generally low. Genetic correlations for DMDl-DMDwp and DMDs-DMDwp mostly exceeded 0.7 and for DMD2l-DMDl 0.6. Markedly lower values were obtained for the DMD2l-DMDwp comparison. Genotypic correlations for DMDwp percentage leaf were greater than 0.4 at one harvest. It is concluded that selection for high DMDwp should result in improvement for both leaf and stem digestibility, providing selection was within populations at the same ploidy level. There appears to be little justification for basing selection on the terminal two-leaf fraction, in view of the relatively incosistent ranking of genotype in the two successive harvest, and the relatively low genetic correlations between digestibility of this fraction and that of the whole plant. |
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Palavras-Chave: |
Dry matter; genetic; Leaf; Plant; Setaria trinervia; Stem. |
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Thesagro: |
Digestibilidade; Genética; Matéria Seca; Planta; Setaria Anceps. |
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Thesaurus Nal: |
digestibility. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 02054naa a2200265 a 4500
001 1784944
005 1995-07-25
008 1974 bl --- 0-- u #d
100 1 $aHACKER, J. B.
245 $aThe genetic relationship between the digestibility of leaf, stem and whole plant in Setaria.
260 $c1974
520 $aThe genetic interrelationships of in vitro dry matter of whole plant (DMDwp), leaf (DMDl), stem (DMDs) and terminal two leaf (DMD2l) fractions were investigated in 4-week regrowth of 21 tetraploid clones of Setaria anceps and 14 hexaploid clones of Setaria trinervia. There were significant differences between genotypes of more than eight digestibility units for all fractions, and for all fractions significant positive correlations were obtained between genotype performance at successive harvests. Genotypic and phenotypic correlations between leaf ans stem digestibility were mainly positive, but generally low. Genetic correlations for DMDl-DMDwp and DMDs-DMDwp mostly exceeded 0.7 and for DMD2l-DMDl 0.6. Markedly lower values were obtained for the DMD2l-DMDwp comparison. Genotypic correlations for DMDwp percentage leaf were greater than 0.4 at one harvest. It is concluded that selection for high DMDwp should result in improvement for both leaf and stem digestibility, providing selection was within populations at the same ploidy level. There appears to be little justification for basing selection on the terminal two-leaf fraction, in view of the relatively incosistent ranking of genotype in the two successive harvest, and the relatively low genetic correlations between digestibility of this fraction and that of the whole plant.
650 $adigestibility
650 $aDigestibilidade
650 $aGenética
650 $aMatéria Seca
650 $aPlanta
650 $aSetaria Anceps
653 $aDry matter
653 $agenetic
653 $aLeaf
653 $aPlant
653 $aSetaria trinervia
653 $aStem
773 $tAustralian Journal of the Agricultural Research$gv.25, p.401-406, 1974.
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Registro original: |
Embrapa Pantanal (CPAP) |
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