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Varietal selection for perennial crops where data relate to multiple harvests from a series of field trials

Journal Article


Abstract


  • Varietal selection for yield from a series

    of multi-environment trials can be regarded as a

    multi-trait selection problem in which the yields in

    different environments are synonymous with traits.

    As such an analysis of the data combined across

    environments should be conducted in order to form

    an index for selection. Analytical methods that

    include appropriate models for both the genetic

    variance structure (that is, the variances and covariances

    of genotype effects from different environments)

    and the residual variance structure (which

    typically comprises spatial covariance models for

    each trial) have been published previously. In the

    case of perennial crops, yields are often obtained

    from multiple harvests which implies that the data

    comprise short sequences of repeated measurements.

    Varietal performance in individual harvests is important

    for selection so that a combined analysis across

    both trials and harvests is required. The repeated

    measures nature of the data provides additional

    modelling challenges. In this paper we propose an

    approach for the analysis of multi-environment,

    multi-harvest data that accommodates the major

    sources of variation and correlation (including temporal).

    The approach is illustrated using two examples

    from sugarcane breeding programmes. The

    proposed models were found to provide a superior

    fit to the data and thence more accurate selection

    decisions than the common practice of conducting

    separate analyses of individual trials and harvests.

Publication Date


  • 2007

Citation


  • Smith, A. B., Stringer, J. K.., Wei, X. & Cullis, B. R. (2007). Varietal selection for perennial crops where data relate to multiple harvests from a series of field trials. Euphytica, 157 (1-2), 253-266.

Scopus Eid


  • 2-s2.0-34548329945

Ro Metadata Url


  • http://ro.uow.edu.au/infopapers/2097

Has Global Citation Frequency


Number Of Pages


  • 13

Start Page


  • 253

End Page


  • 266

Volume


  • 157

Issue


  • 1-2

Place Of Publication


  • Netherlands

Abstract


  • Varietal selection for yield from a series

    of multi-environment trials can be regarded as a

    multi-trait selection problem in which the yields in

    different environments are synonymous with traits.

    As such an analysis of the data combined across

    environments should be conducted in order to form

    an index for selection. Analytical methods that

    include appropriate models for both the genetic

    variance structure (that is, the variances and covariances

    of genotype effects from different environments)

    and the residual variance structure (which

    typically comprises spatial covariance models for

    each trial) have been published previously. In the

    case of perennial crops, yields are often obtained

    from multiple harvests which implies that the data

    comprise short sequences of repeated measurements.

    Varietal performance in individual harvests is important

    for selection so that a combined analysis across

    both trials and harvests is required. The repeated

    measures nature of the data provides additional

    modelling challenges. In this paper we propose an

    approach for the analysis of multi-environment,

    multi-harvest data that accommodates the major

    sources of variation and correlation (including temporal).

    The approach is illustrated using two examples

    from sugarcane breeding programmes. The

    proposed models were found to provide a superior

    fit to the data and thence more accurate selection

    decisions than the common practice of conducting

    separate analyses of individual trials and harvests.

Publication Date


  • 2007

Citation


  • Smith, A. B., Stringer, J. K.., Wei, X. & Cullis, B. R. (2007). Varietal selection for perennial crops where data relate to multiple harvests from a series of field trials. Euphytica, 157 (1-2), 253-266.

Scopus Eid


  • 2-s2.0-34548329945

Ro Metadata Url


  • http://ro.uow.edu.au/infopapers/2097

Has Global Citation Frequency


Number Of Pages


  • 13

Start Page


  • 253

End Page


  • 266

Volume


  • 157

Issue


  • 1-2

Place Of Publication


  • Netherlands