A multivariate procedure for classifying environments according to their interaction with genotypes

Canonical variates analysis was adapted to the problem of classifying environments according to their interactions with wheat genotypes, and was used to subdivide the Central West of New South Wales into uniform sub-regions. The method takes into account any fluctuations from year to year in the genotype x location interaction effects, and has several other advantages over the procedures previously used. Most of the variability among locations was represented by one canonical variate and was related to an east-westerly trend. It is suggested that the Central West be divided into two sub-regions, the eastern slopes and the western plains, for the purpose of varietal evaluations and recommendations.

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Regional evaluation of wheat genotypes for grain protein level in the central west of New South Wales

Australian Journal of Experimental Agriculture ◽

10.1071/ea9810068 ◽

1981 ◽

Vol 21 (108) ◽

pp. 68

Author(s):

E Seif ◽

LN Balaam

Keyword(s):

Protein Level ◽

New South ◽

New South Wales ◽

Heritability Estimate ◽

Grain Protein ◽

Wheat Protein ◽

Wheat Genotypes ◽

First Order ◽

Laboratory Error ◽

South Wales

The analysis of wheat protein data from ten homozygous genotypes grown at six locations in 4 years gave a heritability estimate of 50%, and another of 65% from a sub-set of genotypes of similar maturity. The first-order interactions, genotype x year and genotype x location, were small and nonsignificant. An examination of the variance of a genotype mean indicated that selection in regional testing programs could be based on data from as few as three trials. Laboratory error represented a large proportion of this variance, thus more than one laboratory determination will be necessary.

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Avian use of farm habitats, including windbreaks, on the New South Wales Tablelands

Pacific Conservation Biology ◽

10.1071/pc040180 ◽

2004 ◽

Vol 10 (3) ◽

pp. 180 ◽

Cited By ~ 24

Author(s):

DR. Cilla Kinross

Keyword(s):

Species Composition ◽

Native Species ◽

New South ◽

New South Wales ◽

Bird Species ◽

Agricultural Landscapes ◽

Canonical Variate ◽

Bird Conservation ◽

Avian Diversity ◽

South Wales

Many windbreaks are being planted on the Tablelands of New South Wales, Australia to provide shelter for stock and crops, but little is known of the effect of these linear plantations on the regional bird community. This paper compares the avian diversity, density and species composition in a range of habitats in agricultural landscapes, including farm windbreaks, and draws conclusions as to the benefits of windbreaks to bird conservation. The data were collected between 1993 and 1997 with 12 visits to each of 84 sites, placed a priori into seven habitat types on six grazing properties in the Tablelands of New South Wales, Australia and analysed using ANOVA and canonical variate analysis to identify bird-habitat relationships and patterns. Species diversity and density were found to be highest in remnant woodland and lowest in grassland, but differences between other habitats were less robust. Windbreaks >19 m wide were closer in diversity and species composition to remnant woodland than windbreaks =15 m wide. Of the 105 bird species observed, 17 were confined to remnant woodland and 67 native species were observed using planted sites. These species were not, as had been predicted, entirely composed of generalist-opportunistic species, but, particularly in the wider planted sites, included several woodland species identified as declining in this region. Although clearly not as important as remnant woodland, farm windbreaks, shelterbelts and woodlots of suitable size and composition appear to contribute significantly to avian diversity in agricultural areas and their planting should be encouraged and supported by the rural community and government.

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