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Distribution, diversity and potential agronomic value of Medicago polymorpha in Sardinia

Published online by Cambridge University Press:  27 March 2009

A. Loi ,
C. Porqueddu ,
F. Veronesi  and
P. S. Cocks
A. Loi
Affiliation:
Centro di Studio sul Miglioramento della Produttività del Pascoli, via E De Nicola, 07100 Sassari, Italy
C. Porqueddu
Affiliation:
Centro di Studio sul Miglioramento della Produttività del Pascoli, via E De Nicola, 07100 Sassari, Italy
F. Veronesi
Affiliation:
Dipartimento di Biotecnologie Agrarie ed Ambientali, Università di Ancona, via Monte d'Ago, 60100 Ancona, Italy
P. S. Cocks
Affiliation:
Co-operative Research Centre for Legumes in Mediterranean Agriculture and Faculty of Agriculture, The University of Western Australia, Nedlands, WA 6009, Australia
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Summary

Thirty-five populations of Medicago polymorpha were collected from throughout Sardinia (Italy) in 1989 with a view to developing pasture species suitable for improving degraded grasslands in the northern Mediterranean basin. Herbage and seed production were compared with the Australian cultivar, Circle Valley, over 2 years at Bonassai, north Sardinia. Regeneration in the 2 years after sowing and seed size were also estimated. All variables were related to collection site parameters using multivariate analysis.

Herbage production varied between 2 and 8 t dry matter/ha, and up to 1·5 t/ha of seed was produced. K-means clustering of agronomic and morphological variables indicated that there were two groups present; one similar to variety polymorpha and one to variety vulgaris. There were two other single entry clusters, one of which contained cv. Circle Valley. Principal component analysis of the environmental variables indicated that cluster 1 (vulgaris) was more likely to come from mountainous areas where winter temperatures are low, and cluster 2 (polymorpha) from coastal areas where temperatures are mild. Regeneration of cluster 1 was better than that of cluster 2, which in turn was better than Circle Valley, indicating that populations in cluster 1 are better adapted to the management system imposed at Bonassai.

The results indicate that M. polymorpha has considerable potential to improve the grasslands of Sardinia. However, it is unlikely that imported cultivars will be successful, and it seems important that the selection of local populations should continue. Commercial seed production in Sardinia is likely to be a problem, and grazing management under the conditions of communal ownership may have to be reviewed. It is important that future research and development involves farmers and other industry groups.

Information

Type
Crops and Soils
Information
The Journal of Agricultural Science , Volume 124 , Issue 3 , June 1995 , pp. 419 - 426
Copyright
Copyright © Cambridge University Press 1995

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References

Abd El Moneim, A. M. & Cocks, P. S. (1986). Adaptatio of Medicago rigidula to a cereal-pasture rotation in northwest Syria. Journal of Agricultural Science, Cambridge 107, 179–186.CrossRefGoogle Scholar
Arrigoni, P. V. (1968). Fitoclimatologia della Sardegna. Estratto da Webbia 23, 1–100.CrossRefGoogle Scholar
Bounejmate, M., Beale, P. E. & Robson, A. D. (1992). Annual Medicago species in Morocco. I. Species and their abundance. Australian Journal of Agricultural Research 43, 739–749.CrossRefGoogle Scholar
Christiansen, S. & Svejcar, T. (1989). Evaluation of annual medics and subclovers in Oklahoma. In Proceedings of the 16th International Grassland Congress, Nice, Association Francaise pour la Production Fourragere, pp. 239–240. Paris: INRA.Google Scholar
Cocks, P. S. (1992). Plant attributes leading to persistence in grazed annual medics (Medicago spp.) growing in rotation with wheat. Australian Journal of Agricultural Research 43, 1559–1570.CrossRefGoogle Scholar
Cocks, P. S. (1993 a). Seed and seedling dynamics over four consecutive years from a single seed set of six annual medics (Medicago spp.) in north Syria. Experimental Agriculture 29, 461–472.CrossRefGoogle Scholar
Cocks, P. S. (1993 a). ICARDA's approach to introducing ley farming. In Introducing Ley Farming to the Mediterranean Basin (Eds Christiansen, S., Materon, L., Falcinelli, M. & Cocks, P.), pp. 44–51. Aleppo, Syria: ICARDA.Google Scholar
Cocks, P. S. & Phillips, J. R. (1979). Evolution of subterranean clover in South Australia. I. The strains and their distribution. Australian Journal of Agricultural Research 30, 1035–1052.CrossRefGoogle Scholar
Ehrman, T. & Cocks, P. S. (1990). Ecogeography of annual legumes in Syria: distribution patterns. Journal of Applied Ecology 21, 578–591.CrossRefGoogle Scholar
Ewing, M. A. (1991). The ability of annual medics to nodulate in a moderately acidic environment. PhD thesis, The University of Western Australia.Google Scholar
Ewing, M. A. & Howieson, J. G. (1989). The development of Medicago polymorpha L. as an important pasture species for southern Australia. In Proceedings of the 16th International Grassland Congress, Nice, Association Francaise pour la Production Fourragere, pp. 197–198. Paris: INRA.Google Scholar
Hawkins, D. M. (1982). Topics in Applied Multivariate Analysis. Cambridge: Cambridge University Press.CrossRefGoogle Scholar
Heyn, C. C. (1963). The annual species of Medicago. In Scripta Hierosolymitana Vol. XII. Jerusalem: Magnes Press.Google Scholar
Lesins, K. A. & Lesins, I. (1979). Genus Medicago (Leguminosae). A Taxogenetic Study. The Hague: Dr W. Junk.CrossRefGoogle Scholar
Loi, A., Howieson, J. G., Cocks, P. S. & Caredda, S. (1993). The adaptation of Medicago polymorpha to a range of edaphic and environmental conditions: effect of temperature on growth, and acidity stress on nodulation and nod gene induction. Australian Journal of Experimental Agriculture 33, 25–30.CrossRefGoogle Scholar
Manly, B. F. J. (1994). Multivariate Statistical Methods: a Primer. London: Chapman & Hall.Google Scholar
Moreno, V. & Olea, L. (1988). The Selection of Annual Legumes for Mediterranean Pasture Improvement. Badajoz, Spain: SIA Junta de Extremadura.Google Scholar
Morrison, D. F. (1976). Multivariate Statistical Methods. New York: McGraw-Hill.Google Scholar
Piano, E., Sardara, M. & Pusceddu, S. (1982). Observations on the distribution and ecology of subterranean clover and other annual legumes in Sardinia. Rivista di Agronomia 12, 273–283.Google Scholar
Porqueddu, C., Loi, A. & Veronesi, F. (1992). Collection and agronomic characterization of Medicago polymorpha L. populations in Sardinia. In Proceedings of the X EUCARPIA Medicago saliva Group Meeting (Eds Rotili, P. & Zannone, L.), pp. 460–465. Lodi, Italy.Google Scholar
Porqueddu, C., Loi, A. & Veronesi, F. (1963). Variability in plant morphology and seed production of Sardinian germplasm of burr medic (Medicago polymorpha L.). In Proceedings of the 17th International Grassland Congress, Palmerston North (Ed. Baker, M.), pp. 226–228. New Zealand Grassland Association.Google Scholar
Prosperi, J. M. (1993). Selection of annual medics for French Mediterranean regions. In Introducing Ley Farming to the Mediterranean Basin (Eds Christiansen, S., Materon, L., Falcinelli, M. & Cocks, P.), pp. 173–191. Aleppo, Syria: ICARDA.Google Scholar
Puckridge, D. W. & French, R. J. (1983). The annual legume pasture in cereal ley farming systems of southern Australia: a review. Agriculture, Ecosystems and Environment 9, 229–267.CrossRefGoogle Scholar
Rossiter, R. C. & Collins, W. J. (1988). Genetic diversity in old subterranean clover (Trifolium subterraneum L.) populations in Western Australia. I. Pastures sown initially to the Dwalganup strain. Australian Journal of Agricultural Research 39, 1051–1062.CrossRefGoogle Scholar
Systat Software (1992). Systat for Windows. Evanston, Illinois: SYSTAT Inc.Google Scholar