Caracteristicas fisicas e conteudo de proteinas de endospermas normal e sugary opaque-2, em espigas segregantes

AUTOR(ES)
DATA DE PUBLICAÇÃO

1979

RESUMO

Seven groups of segregating ears with different normal to sugary opaque-2 endosperm ratios were produced artificially to see whether the different sink effects of the two maize types could influence each other in terms of physical or protein characteristics when developing side-by-side on the same ear. The segregating ears were produced after pollination of sugary opaque-2 plants using different pollen mixtures of normal and sugary opaque-2 pollen grains based on volume of microspore. Endosperms were analysed at maturity from six individual ears in each of the seven segregating groups. Dry Matter accumulation (mg / endosperm). Moisture percentage, total nitrogen percentage, and zein percentage were studied. These traits were not altered in both normal and sugary opaque-2 endosperms of the several segregating groups. The results demonstrate that dry matter, total nitrogen and zein accumulation in normal and sugary opaque-2 endosperms are not affected by different levels of nutrients taken into the segregating ears. The Landy-Moureaux fractions in the sugary opaque-2 endosperms also showed no difference between the two segregating groups containing 71,7 and 7,9% of normal endosperms. The amount of free amino acid, though statistically lower in the group with 71,7% of normal endosperms, showed small difference corresponding to 5,8% of total endosperm nitrogen... Note: The complete abstract is available with the full electronic digital thesis or dissertations

ASSUNTO(S)

proteinas na nutrição humana milho - aspectos nutricionais

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