New Zealand Journal of Agricultural Research abstracts
Phenotypic variability in leaf length, width and area and their
relationships in clones of two subspecies of Paspalum dilatatum during
summer and autumn
S. I. Alonso*
M. G. Monterubbianesi
Facultad de Ciencias Agrarias
Universidad Nacional de Mar del Plata
Argentina
*Present address: CC 276-7620 Balcarce,
Buenos Aires, Argentina. salonso@balcarce.inta.gov.ar
Abstract Paspalum dilatatum is a South
American forage grass with two subspecies in Argentina and Uruguay.
Little is known about the variability of length, width and area of
blades among and within clones of P. dilatatum
subspecies, or about the relationships between leaf area and its
components. The length, width and area of the last unfolded leaf was
measured for 14 clones of both subspecies, at different summer and
autumn dates. Differences between subspecies and among clones were
detected for almost all those characters. On average, clones of ssp. dilatatum
were higher than those of ssp. flavescens. Different linear
models to predict leaf area were performed for each subspecies and
season, using effects of date, clone, leaf length and leaf width as
covariables. Estimates based only upon leaf length had a slightly lower
fit than the most complex models, but they are more practical because
only leaf length measurements are required and as a result, they are
less time consuming.
Keywords dallisgrass; clones; foliar size; leaf
area estimations; wild germplasm
A04090; Received 6 October 2004; accepted 21 September 2005; Online
publication date 28 February 2006
New Zealand Journal of Agricultural Research, 2006, Vol. 49:
25–33
0028–8233/06/4901–0025 © The Royal Society of New Zealand 2006
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