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    Article

    A theoretical treatment of interval map** of a disease gene using transmission disequilibrium tests

    The genetic basis of the transmission disequilibrium test (TDT) for two-marker loci is explored from first principles. In this case, parents doubly heterozygous for a given haplotype at the pair of marker loci...

    P. Narain in Journal of Biosciences (2007)

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    Article

    Accuracy of marker-assisted selection with auxiliary traits

    Genetic information on molecular markers is increasingly being used in plant and animal improvement programmes particularly as indirect means to improve a metric trait by selection either on an individual basi...

    P. Narain in Journal of Biosciences (2003)

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    Article

    On an extremum principle in the genetical theory of natural selection

    Natural selection causes gene frequency changes in a large population leading to genetic evolution over evolutionary time scales. Such gene frequency changes, however, involve an optimizing principle. Accordin...

    P. Narain in Journal of Genetics (1993)

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    Population Genetics of Quantitative Characters

    Even before the science of genetics was born in 1900, evolution and inheritance of quantitative characters were topics of intensive research in the hands of stalwarts like Galton, Pearson, etc. The law of ance...

    P. Narain in Human Population Genetics (1993)

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    Article

    Effect of perennial mulches on moisture conservation and soil-building properties through agroforestry

    The effect of perennial mulches on moisture status, soil characteristics and on crop yields (maize-wheat rotation) was evaluated from 1986 through 1989 in a silty loam acidic soil (pH 5.6, PWP 11.4 & FC 25.6%)...

    V. P. S. Tomar, P. Narain, K. S. Dadhwal in Agroforestry Systems (1992)

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    Article

    Studies on root distribution of five multipurpose tree species in Doon Valley, India

    Observations on the growth performance, rooting behaviour and distribution of fine roots of five tree species viz., Bauhinia purpurea, Grewia optiva, Eucalyptus tereticornis, Leucaena leucocephala and Ougeinia oo...

    S. K. Dhyani, P. Narain, R. K. Singh in Agroforestry Systems (1990)

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    Article

    Asymptotically efficient partial diallel crosses

    The asymptotic efficiency of partial diallel crosses is defined, and circulant plans having such a property are identified. In the absence of an optimal plan to suit his requirements, the breeder should opt fo...

    A. S. Arya, P. Narain in Theoretical and Applied Genetics (1990)

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    Article

    A note on the estimation of components of variation due to interaction between genotype and temperature for wing length and bristle number inDrosophila ananassae

    The analysis of the experiment conducted by Taneja and Negi (1964) in respect of genotype X temperature interactions inDrosophila ananassae has been examined critically by emphasising the underlying genetical mod...

    P. Narain, K. M. Reddy in Journal of Genetics (1970)