Skip to main content
×
Home
    • Aa
    • Aa
  • Get access
    Check if you have access via personal or institutional login
  • Cited by 30
  • Cited by
    This article has been cited by the following publications. This list is generated based on data provided by CrossRef.

    Scolforo, Henrique Ferraço Scolforo, José Roberto Soares de Mello, José Marcio Filho, Antônio Carlos Ferraz Rossoni, Diogo Francisco Altoé, Thiza Falqueto Oliveira, Antônio Donizette and de Lima, Renato Ribeiro 2016. Autoregressive spatial analysis and individual tree modeling as strategies for the management of Eremanthus erythropappus. Journal of Forestry Research, Vol. 27, Issue. 3, p. 595.


    Diepeveen, D. Webster, H. and Appels, R. 2014. Encyclopedia of Agriculture and Food Systems.


    Dixon, Philip M. 2014. Wiley StatsRef: Statistics Reference Online.


    Dixon, Philip M. 2013. Encyclopedia of Environmetrics.


    Kiær, Lars P. Skovgaard, Ib M. and Østergård, Hanne 2012. Effects of inter-varietal diversity, biotic stresses and environmental productivity on grain yield of spring barley variety mixtures. Euphytica, Vol. 185, Issue. 1, p. 123.


    Zub, H. W. Monod, H. Béthencourt, L. and Brancourt-Hulmel, M. 2012. An Index of Competition Reduces Statistical Variability and Improves Comparisons between Genotypes of Miscanthus. BioEnergy Research, Vol. 5, Issue. 4, p. 829.


    Dawson, Julie C. and Goldringer, Isabelle 2011. Organic Crop Breeding.


    Kunert, Joachim and Mersmann, Sabine 2011. Optimal designs for an interference model. Journal of Statistical Planning and Inference, Vol. 141, Issue. 4, p. 1623.


    Stringer, Joanne K. Cullis, Brian R. and Thompson, Robin 2011. Joint Modeling of Spatial Variability and Within-Row Interplot Competition to Increase the Efficiency of Plant Improvement. Journal of Agricultural, Biological, and Environmental Statistics, Vol. 16, Issue. 2, p. 269.


    Boyden, Suzanne Binkley, Dan and Stape, José Luiz 2008. COMPETITION AMONGEUCALYPTUSTREES DEPENDS ON GENETIC VARIATION AND RESOURCE SUPPLY. Ecology, Vol. 89, Issue. 10, p. 2850.


    Ye, Terrance Z. and Jayawickrama, Keith J. S. 2008. Efficiency of using spatial analysis in first-generation coastal Douglas-fir progeny tests in the US Pacific Northwest. Tree Genetics & Genomes, Vol. 4, Issue. 4, p. 677.


    Andersson, Bengt Elfving, Björn Persson, Torgny Ericsson, Tore and Kroon, Johan 2007. Characteristics and development of improvedPinus sylvestrisin northern Sweden. Canadian Journal of Forest Research, Vol. 37, Issue. 1, p. 84.


    Deardon, Rob Gilmour, Steven G. Butler, Neil A. Phelps, Kath and Kennedy, Roy 2006. Designing field experiments which are subject to representation bias. Journal of Applied Statistics, Vol. 33, Issue. 7, p. 663.


    Dixon, Philip M. 2006. Encyclopedia of Environmetrics.


    Deardon, R. Gilmour, S. G. Butler, N. A. Phelps, K. and Kennedy, R. 2004. A Method for Ascertaining and Controlling Representation Bias in Field Trials for Airborne Plant Pathogens. Journal of Applied Statistics, Vol. 31, Issue. 3, p. 329.


    Federer, Walter T. 2000. The Author Replied as Follows:. Biometrics, Vol. 56, Issue. 3, p. 945.


    Shukla, G. K. and Subrahmanyam, G. S. V. 1999. A Note on an Exact Test and Confidence Interval for Competition and Overlap Effects. Biometrics, Vol. 55, Issue. 1, p. 273.


    Hohls, T. and Clarke, G. P.Y. 1996. An incomplete block design for reducing competition between inbreds and hybrids in a diallel cross experiment. South African Journal of Plant and Soil, Vol. 13, Issue. 3, p. 74.


    Bänziger, M. Lafitte, H.R. and Edmeades, G.O. 1995. Intergenotypic competition during evaluation of maize progenies under limited and adequate N supply. Field Crops Research, Vol. 44, Issue. 1, p. 25.


    Talbot, M. Milner, A. D. Nutkins, M. A. E. and Law, J. R. 1995. Effect of interference between plots on yield performance in crop variety trials. The Journal of Agricultural Science, Vol. 124, Issue. 03, p. 335.


    ×

Adjustment for competition between varieties in plant breeding trials

  • R. A. Kempton (a1)
  • DOI: http://dx.doi.org/10.1017/S0021859600054381
  • Published online: 01 March 2009
Abstract
SUMMARY

A method is proposed for correcting for competition effects in yield trials by joint regression of plot yields on to the yields of neighbours. Estimation of the variety effects and competition coefficient along with tests of significance are described for a sugar-beet trial with single-row plots where competition effects are assumed to extend only to plants in immediately adjacent rows. For designs which are balanced for neighbouring varieties it is feasible to estimate separate varietal competition coefficients which may be partitioned into components for sensitivity and aggressiveness. An example is given of this extended model fitted to a competition diallel of seven species. While species differed in their sensitivity to competition there was no essential difference between inter- and intra-species behaviour. The model is used to assess comparative varietal performance in monocultures from performance in small plot trials.

(Note that the general term ‘variety’ is used throughout this paper to refer to progenies at any stage in a selection programme.)

Copyright
Linked references
Hide All

This list contains references from the content that can be linked to their source. For a full set of references and notes please see the PDF or HTML where available.

M. G. R. Cannell , C. K. Njuguna , E. D. Ford , R. Smith & H. M. Ross-Parker (1977). Variation in yield among competing individuals within mixed genotype stands of tea: a selection problem. Journal of Applied Ecology 14, 969985.

N. R. Draper & I. Guttman (1980). Incorporating overlap effects from neighbouring units into response surface models. Applied Statistics 29, 128134.

K. W. Finlay & G. N. Wilkinson (1963). The analysis of adaption ina plant breeding programme. Australian Journal of Agricultural Research 14, 742754.

N. F. Jensen & W. T. Federer (1964). Adjacent row competition in wheat. Crop Science 4, 641645.

R. A. Kempton & C. W. Howes (1981). The use of neighbouring plot values in the analysis of variety trials. Applied Statistics 30, 5970.

J. A. Nelder (1962). New kinds of systematic designs for spacing experiments. Biometrics 18, 283307.

J. K. Ord (1975). Estimation methods for models of spatial interaction. Journal of the American Statistical Association 70, 120126.

H. D. Patterson & V. Silvey (1980). Statutory and recommended list trials of crop varieties in the UK (with Discussion). Journal of the Royal Statistical Society A 143, 219252.

R. M. Williams (1952). Experimental designs for serially correlated observations. Biometrika 39, 152167.

Recommend this journal

Email your librarian or administrator to recommend adding this journal to your organisation's collection.

The Journal of Agricultural Science
  • ISSN: 0021-8596
  • EISSN: 1469-5146
  • URL: /core/journals/journal-of-agricultural-science
Please enter your name
Please enter a valid email address
Who would you like to send this to? *
×