Classification of a world collection of white clover cultivars

Abstract

Morphology, flowering, cyanogenesis and leaf markings of 109 white clover (Trifolium repens L .) cultivars, grown as spaced plants and in small plots, were measured . Principal component analysis and cluster analysis were used to compare cultivars . Cultivars were classified into four broad groups . The most important criteria for distinguishing between groups were leaf size, cyanogenesis and combinations of these . Group I, termed small, included small-leaved, prostrate cultivars ; Group II, termed intermediate, included the majority of the cultivars which were characterised by medium sized leaves and relatively low cyanogenesis levels ; Group III, termed large, included the large-leaved highly cyanogenic cultivars ; and Group IV, termed ladino, included large-leaved acyanogenic cultivars .

Review: World checklist of white clover varieties II

“…Low HCN concentration (Crush & Caradus 1995;Lehmann et al 1995) with only 10% of plants cyanogenic (Caradus et al 1989a). Stolon density less than 50% that of HUIA (Caradus et al 1991a).…”

“…High HCN production with 70% of plants cyanogenic (Caradus et al 1989a). No short/long day induction required for flowering; had consistently high production and concentration of nectar (Norris 1987).…”

“…Maintained the highest clover content at the highest N rate (150 kg/ha) (Breazu et al 1994). Description: Medium-leaved (Yamada et al 1987;Garcia 1995) with low flowering density (Garcia 1993) and acyanogenic (Mika 1984;Caradus et al 1989a). …”

Relationships between agronomic characters and ecogeographical factors in a collection of French perennial ryegrass populations

“…Concerning herbage legumes, many studies have been undertaken both at the interspecific level (Prosperi et al, 1989) on annual medics and at the intraspecific level (Caradus et al, 1989) on white clover. Finally, in herbage grasses, most work relating to the relationships between ecological and agronomic traits has been aimed at perennial ryegrass in Europe (studies undertaken by the Welsh Plant Breeding Station: Breese, 1966, 1968;Lorenzetti et al, 1971;Tyler andChorlton, 1976, 1978;Tyler et al, 1984;Humphreys and Eagles, 1988) and also in New Zealand (Forde and Suckling, 1980).…”

Morphoagronomic variation in natural populations of Trifolium riograndense (Burkart)

“…In white clover, Bortolini et al (2006) reported that leaf area, plant height, flowering intensity and dry matter production contributed more to discriminate accessions. Flores et al (2004) considered phenology, plant height and diameter and Caradus et al (1989) indicated leaf area and cyanogenesis as the most important aspects to differentiate groups.…”