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Aboveground phytomass productivity and morphological variability of Tunisian accessions of Cenchrus ciliaris L.

Aboveground phytomass productivity and morphological variability of Tunisian accessions of... This study assessed the aboveground aerial phytomass produced by 47 accessions of Cenchrus ciliaris L. locally collected in the arid zone of Tunisia and classified into six eco-geographic groups. The extent of genetic variation in five morphologic parameters was examined. Correlations among all parameters were also analysed. For three years, phytomass of these accessions was cut and measured for three cutting periods characterised by different rainfall features. In 1998 the mean of the phytomass productivity was 199.1g DM (Dry Matter) plant–1. The productivity in 1999 was 81.0g DM plant–1, but in 2000 the productivity was only 21.6g DM plant–1. Positive correlations were found between dry matter and all morphological parameters, especially tuft diameter (r = 0.670) and tuft height (r = 0.637). Principal components analysis was carried out on all variables. For both dry matter and phenology, individuals differentiated strongly, but irrespective of their accession or eco-geographic origin. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png African Journal of Range & Forage Science Taylor & Francis

Aboveground phytomass productivity and morphological variability of Tunisian accessions of Cenchrus ciliaris L.

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Aboveground phytomass productivity and morphological variability of Tunisian accessions of Cenchrus ciliaris L.

Abstract

This study assessed the aboveground aerial phytomass produced by 47 accessions of Cenchrus ciliaris L. locally collected in the arid zone of Tunisia and classified into six eco-geographic groups. The extent of genetic variation in five morphologic parameters was examined. Correlations among all parameters were also analysed. For three years, phytomass of these accessions was cut and measured for three cutting periods characterised by different rainfall features. In 1998 the mean of the...
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Publisher
Taylor & Francis
Copyright
Copyright Taylor & Francis Group, LLC
ISSN
1727-9380
eISSN
1022-0119
DOI
10.2989/10220110409485833
Publisher site
See Article on Publisher Site

Abstract

This study assessed the aboveground aerial phytomass produced by 47 accessions of Cenchrus ciliaris L. locally collected in the arid zone of Tunisia and classified into six eco-geographic groups. The extent of genetic variation in five morphologic parameters was examined. Correlations among all parameters were also analysed. For three years, phytomass of these accessions was cut and measured for three cutting periods characterised by different rainfall features. In 1998 the mean of the phytomass productivity was 199.1g DM (Dry Matter) plant–1. The productivity in 1999 was 81.0g DM plant–1, but in 2000 the productivity was only 21.6g DM plant–1. Positive correlations were found between dry matter and all morphological parameters, especially tuft diameter (r = 0.670) and tuft height (r = 0.637). Principal components analysis was carried out on all variables. For both dry matter and phenology, individuals differentiated strongly, but irrespective of their accession or eco-geographic origin.

Journal

African Journal of Range & Forage Science – Taylor & Francis

Published: Jul 1, 2004

Keywords: ARID ZONES; BUFFELGRASS; GRASSLAND; TUNISIA

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