Agronomic, leaf anatomy, morphology, endophyte presence and ploidy characterization of accessions of "Festuca" group "rubra" collected in northren Spain
Fifteen accessions of Festuca group rubra collected in northern Spain were characterized and grouped into four Festuca taxa on the basis of leaf anatomy, morphology and ploidy; seven were identified as F. heteromalla; two as F. trichophylla ssp. asperifolia; two as F. nigrescens ssp. microphylla and...
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Veröffentlicht in: | Spanish journal of agricultural research : SJAR 2008 (4), p.586-598 |
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Zusammenfassung: | Fifteen accessions of Festuca group rubra collected in northern Spain were characterized and grouped into four Festuca taxa on the
basis of leaf anatomy, morphology and ploidy; seven were identified as F. heteromalla; two as F. trichophylla ssp. asperifolia; two as F.
nigrescens ssp. microphylla and four as F. rubra ssp. pruinosa. All the accessions and one commercial cultivar Wilma (F. nigrescens
ssp. nigrescens), used as control, were established at the Mabegondo Agronomical Research Centre, A Coruña (Galicia) in a completely
randomised block design with three replicates of 10 plants per accession. The plants were agronomically characterized for seven
traits during 2004 and 2005. Cluster analysis was useful in identifying four clusters that described 66.5% of the phenotypic variation.
Cluster 1 consisted of nine accessions with early heading, intermediate values of green colour and tolerance to crown rust in autumn
and the highest seasonal growth. Cluster 2 contained two accessions with intermediate values of heading, green colour, good tolerance
to crown rust in autumn and intermediate seasonal growth. Cluster 3 contained two accessions and the cultivar Wilma, which showed
early heading, dark green colour, good tolerance to crown rust in autumn and spring and intermediate seasonal growth. Cluster 4 consisted
of two late heading accessions with dark green colour, and the best tolerance to crown rust in autumn and intermediate seasonal
growth. Thirteen of the 15 accessions (86.6%) were infected by fungal endophytes, with the degree of infection ranging from 2 to 73%. Quince accesiones de Festuca grupo rubra recogidas en el norte de España se caracterizaron y agruparon en cuatro taxa usando
caracteres de anatomía foliar, morfología y ploidía: siete de ellas como F. heteromalla, dos como F. trichophylla ssp. asperifolia,
dos como F. nigrescens ssp. microphylla y cuatro como F. rubra ssp. pruinosa. Todas las accesiones y el cultivar Wilma (F.
nigrescens ssp. nigrescens) se establecieron en el Centro de Investigaciones Agrarias de Mabegondo, A Coruña (Galicia), en un
diseño en bloques completos al azar con tres repeticiones de 10 plantas por accesión. Durante los años 2004 y 2005 se anotaron
siete caracteres agronómicos en las plantas. Mediante la clasificación jerárquica se identificaron cuatro grupos, describiendo el
66,5% de la variación fenotípica. El grupo 1 incluyó nueve accesiones con espigado precoz, valores intermedios de color verde y
de tolerancia |
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ISSN: | 1695-971X 2171-9292 2171-9292 |