7,319 research outputs found

    Interação insetos-sementes: o mutualismo é possível.

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    Nesta publicação encontram-se reunidas informações sobre insetos e sementes de Parkia multijuga, Coffea canephora e Gossypium thurberi, para produzir um quadro comparativo da interação entre esses grupos de espécies. Argumentou-se que, no período reprodutivo das plantas, a cooperação entre estes organismos pode ir além da polinização. Foi proposto que os insetos podem ser elementos chave na estratégia reprodutiva das plantas, contribuindo decisivamente para o sucesso da germinação e estabelecimento de novas plântulas.bitstream/item/24657/1/doc98-insetos-sementes.pd

    Caracterização de cinco linhagens de soja em Aral Moreira, MS, safra 1998/99.

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    bitstream/item/64981/1/BP4-00-aral.pd

    Influência da população de plantas e de épocas de semeadura sobre o comportamento da soja, em Dourados, MS, safra 2000/2001.

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    bitstream/item/65710/1/COT-50-2001.pd

    Estimando o threshold de detecção para defeitos da bebida de café.

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    bitstream/CTAA-2009-09/9980/1/ct102-2006.pd

    Mating system parameters in a high density population of andirobas in the Amazon forest.

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    The objective of this work was to estimate the mating system parameters of a andiroba (Carapa guianensis) population using microsatellite markers and the mixed and correlated mating models. Twelve open-pollinated progeny arrays of 15 individuals were sampled in an area with C. guianensis estimated density of 25.7 trees per hectare. Overall, the species has a mixed reproductive system, with a predominance of outcrossing. The multilocus outcrossing rate (tm = 0.862) was significantly lower than the unity, indicating that self-pollination occurred. The rate of biparental inbreeding was substantial (tm - ts = 0.134) and significantly different from zero. The correlation of selfing within progenies was high (rs = 0.635), indicating variation in the individual outcrossing rate. Consistent with this result, the estimate of the individual outcrossing rate ranged from 0.598 to 0.978. The multilocus correlation of paternity was low (rp(m) = 0.081), but significantly different from zero, suggesting that the progenies contain full?sibs. The coancestry within progenies (O = 0.185) was higher and the variance effective size (Ne(v) = 2.7) was lower than expected for true half-sib progenies (O = 0.125; Ne(v) = 4). These results suggest that, in order to maintain a minimum effective size of 150 individuals for breeding, genetic conservation, and environmental reforestation programs, seeds from at least 56 trees must be collected

    Comportamento da variedade de soja BRS 181 na região sul do estado de Mato Grosso do Sul, safra 1998/99.

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    bitstream/item/65692/1/COT-35-2001.pd

    O efeito da densidade no desempenho do tambaqui Colossoma macropomum cultivado em gaiolas flutuantes.

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    bitstream/item/86405/1/Digitalizar0145.pd
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