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Morphological adaptation to Lolium rigidum Gaudin to different conditions of the Medeterranean semi-arid environment

Franca, Antonello and Seddaiu, Giovanna and Caredda, Salvatore (2005) Morphological adaptation to Lolium rigidum Gaudin to different conditions of the Medeterranean semi-arid environment. Agricoltura mediterranea, Vol. 135 (3-4), p. 202-208. ISSN 0394-0438. Article.

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Abstract

A field evaluation, aimed at comparing several morphological traits of one cultivar ("Wimmera") and a Sardinian genotype ("Nurra") of annual ryegrass, was carried out in Northern Sardinia. The two accessions were compared over two years in a field experiment, following the UPOV rules for the identification of new cultivars. The distinctness of "Nurra" for flag leaf, tiller, spike and spikelet length was clearly demonstrated. Also, some "Nurra" plant adjustments in water-limited environmental conditions in late spring (elongation of spikelets and awns, late heading, increase of awn presence, higher fertility) seem to be an adaptive response of a drought-tolerant morphotype. The results of this experiment contribute to the agronomic valorisation of "Nurra" ryegrass as a valid drought-tolerant material suitable for introduction into the semi-arid pasture seed market.

Item Type:Article
ID Code:4501
Status:Published
Refereed:Yes
Uncontrolled Keywords:Lolium rigidum, "Nurra", drought-tolerant morphotype, adaptation
Subjects:Area 07 - Scienze agrarie e veterinarie > AGR/02 Agronomia e coltivazioni erbacee
Divisions:001 Università di Sassari > 01 Dipartimenti > Scienze agronomiche e genetica vegetale agraria
002 Altri enti e centri di ricerca del Nord Sardegna > CNR-Consiglio Nazionale delle Ricerche > Istituto per il sistema produzione animale in ambiente Mediterraneo, Sassari
Publisher:Edizioni PLUS - Università di Pisa
ISSN:0394-0438
Publisher Policy:Depositato per gentile concessione dell'Editore
Deposited On:17 Sep 2010 18:08

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