Get 20M+ Full-Text Papers For Less Than $1.50/day. Start a 14-Day Trial for You or Your Team.

Learn More →

Evaluation of phalaris ( Phalaris aquatica L.) germplasm for persistence under grazing on the North-West Slopes, New South Wales

Evaluation of phalaris ( Phalaris aquatica L.) germplasm for persistence under grazing on the... The survival of available cultivars of introduced temperate perennial grasses has been less than adequate under grazing on the North-West Slopes of New South Wales. A wide range of germplasm of the Mediterranean perennial grass, phalaris ( Phalaris aquatica L.), was assessed for persistence, seedling vigour, winter yield potential, time of reproductive development, and summer dormancy in grazed swards at 3 sites (Manilla, Tamworth, Purlewaugh) from 1998 to 2001. The aim was to understand population characteristics that influence persistence in this environment and to identify persistent populations. Good establishment was achieved after above-average winter–spring rainfall in 1998. Persistence was high during the first year of grazing (1999) but declined under lower rainfall during 2000 at the Manilla and Tamworth sites. By 2001, a wide range in persistence had developed at these 2 sites. A group of wild populations, mainly from North Africa, was identified as being more persistent at both sites than any available cultivar. Two early cultivars, Sirocco and CPI 19305, were also relatively persistent. None of the germplasm survived a subsequent severe drought in 2002 at Manilla and Tamworth. Persistence remained high despite higher grazing pressure at the Purlewaugh site until the 2002 drought year, when changes in survival correlated with those at the other sites occurred. Biplot analysis indicated that early reproductive development and high summer dormancy were associated with persistence in both wild and bred populations. High seedling and winter growth potential was less strongly associated with persistence. Wild and bred germplasm from North Africa displayed these characteristics to a marked extent, whereas germplasm from southern Europe and Sardinia did not and was less persistent. A group of wild populations mainly from Morocco was identified as the basis for cultivar development. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Crop and Pasture Science CSIRO Publishing

Evaluation of phalaris ( Phalaris aquatica L.) germplasm for persistence under grazing on the North-West Slopes, New South Wales

Download PDF
11 pages

Loading next page...
 
/lp/csiro-publishing/evaluation-of-phalaris-phalaris-aquatica-l-germplasm-for-persistence-71SkQLmRv0

References

References for this paper are not available at this time. We will be adding them shortly, thank you for your patience.

Publisher
CSIRO Publishing
Copyright
CSIRO
ISSN
1836-0947
eISSN
1836-5795
DOI
10.1071/AR04300
Publisher site
See Article on Publisher Site

Abstract

The survival of available cultivars of introduced temperate perennial grasses has been less than adequate under grazing on the North-West Slopes of New South Wales. A wide range of germplasm of the Mediterranean perennial grass, phalaris ( Phalaris aquatica L.), was assessed for persistence, seedling vigour, winter yield potential, time of reproductive development, and summer dormancy in grazed swards at 3 sites (Manilla, Tamworth, Purlewaugh) from 1998 to 2001. The aim was to understand population characteristics that influence persistence in this environment and to identify persistent populations. Good establishment was achieved after above-average winter–spring rainfall in 1998. Persistence was high during the first year of grazing (1999) but declined under lower rainfall during 2000 at the Manilla and Tamworth sites. By 2001, a wide range in persistence had developed at these 2 sites. A group of wild populations, mainly from North Africa, was identified as being more persistent at both sites than any available cultivar. Two early cultivars, Sirocco and CPI 19305, were also relatively persistent. None of the germplasm survived a subsequent severe drought in 2002 at Manilla and Tamworth. Persistence remained high despite higher grazing pressure at the Purlewaugh site until the 2002 drought year, when changes in survival correlated with those at the other sites occurred. Biplot analysis indicated that early reproductive development and high summer dormancy were associated with persistence in both wild and bred populations. High seedling and winter growth potential was less strongly associated with persistence. Wild and bred germplasm from North Africa displayed these characteristics to a marked extent, whereas germplasm from southern Europe and Sardinia did not and was less persistent. A group of wild populations mainly from Morocco was identified as the basis for cultivar development.

Journal

Crop and Pasture Science – CSIRO Publishing

Published: Jul 22, 2005

References

  • Registration of Perla Koleagrass.
    Adams TE
  • New horizons for phalaris.
    Anon.
  • Persistence of temperate perennial grasses, northwest slopes, NSW.
    Archer KA
  • The influence of odour and taste on the food preferences and food intake of sheep.
    Arnold GW
  • Grasses tested for soil conservation. Results to April, 1958.
    Cameron DG
  • The estimation of phosphorus fertilizer requirements of wheat in southern New South Wales by soil analysis.
    Colwell JD
  • Climatic variation in forage grasses. II. Germination, flowering and leaf development in Mediterranean populations of Phalaris tuberosa.
    Cooper JP
  • Spatial analysis of field experiments – an extension to two dimensions.
    Cullis BR
  • Persistence of Phalaris aquatica L. in response to grazing.
    Culvenor RA
  • Selection for persistence under grazing in winter-active populations of the perennial grass, Phalaris aquatica L. (phalaris).
    Culvenor RA
  • Novel perennial forage germplasm from North Africa and Sardinia.
    Cunningham PJ
  • The biplot graphic display of matrices with application to principal component analysis.
    Gabriel KR
  • Accounting for natural and extraneous variation in the analysis of field experiments.
    Gilmour AR
  • Summer dormancy in Phalaris aquatica L.
    Hoen K