Ulmus minor 'Dehesa de la Villa'

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Ulmus minor 'Dehesa de la Villa'
Ulmus minor 'Dehesa de la Villa'.jpg
'Dehesa de la Villa'
Species Ulmus minor
Cultivar 'Dehesa de la Villa'
OriginSpain

The Field Elm cultivar Ulmus minor 'Dehesa de la Villa' was cloned by root cuttings from a tree growing in the eponymous park within the Moncloa-Aravaca district of north-west Madrid ( 40°27′29″N3°44′0″W / 40.45806°N 3.73333°W / 40.45806; -3.73333 ), [1] by researchers at the Escuela Técnica Superior de Ingenieros de Montes, Universidad Politėcnica de Madrid in 1990. [1]

Contents

'Dehesa de la Villa' was introduced to the UK in 2017, by Hampshire & Isle of Wight Branch, Butterfly Conservation, as part of an assessment of DED-resistant cultivars as potential hosts of the endangered White-letter Hairstreak. [2]

Description

In the trials at Puerta de Hierro, Madrid, "Dehesa de la Villa" grew monopodially at a relatively slow rate of 63 cm per year. Corky tissue is present on branches. The leaves, on 6 mm petioles, are elliptic, typically acuminate at the apex, the average length and width 55 × 36 mm, the margins doubly serrate. Foliar density relative to 'Sapporo Autumn Gold' is described as 'high'. In the Madrid study, the appearance of the tree was rated 4.3 / 5. [1] The tree was the first of the Madrid clones to leaf in southern England, flushing in the first week of April. Where grown on fertile loam at the Grange Farm Arboretum in Lincolnshire, the tree attained sexual maturity aged six years, and also commenced suckering from roots. [2]

Pests and diseases

'Dehesa de la Villa' is one of the five Madrid U. minor cultivars found to have a very high resistance to Dutch Elm Disease, on a par with, if not greater than, the hybrid cultivar 'Sapporo Autumn Gold'. [1]

Cultivation

The cultivar is (2018) undergoing further trials in different environments in Spain, where it was first tested for disease resistance by inoculation in 2009. If resistance remains satisfactory, the tree will be released to commerce under licence.

Accessions

Europe

Related Research Articles

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<i>Ulmus</i> Columella Elm cultivar

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<i>Ulmus</i> Fiorente Elm cultivar

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<i>Ulmus</i> Morfeo Elm cultivar

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<i>Ulmus minor</i> Ademuz Elm cultivar

The field elm cultivar Ulmus minor 'Ademuz' was cloned by root cuttings from a tree assumed to be growing in or near the eponymous town 100 km north-west of Valencia, Spain. The tree was discovered in 1996 by Margarita Burón of the Escuela Técnica Superior de Ingenieros de Montes, Universidad Politėcnica de Madrid (UPM). 'Ademuz' is one of a number of U. minor clones found to have a very high resistance to Dutch Elm Disease, on a par with, if not greater than, the hybrid cultivar 'Sapporo Autumn Gold' grown as a control. In the Madrid study, the appearance of the tree was rated 4.5 / 5, the most attractive of the seven selected cultivars.

<i>Ulmus minor</i> Dehesa de Amaniel Elm cultivar

The field elm cultivar Ulmus minor 'Dehesa de Amaniel' was raised from seed collected in 1999 from a tree growing in the Dehesa de la Villa park, within the Moncloa-Aravaca district of north-west Madrid by researchers at the Escuela Técnica Superior de Ingenieros de Montes, Universidad Politėcnica de Madrid. 'Dehesa de Amaniel' is one of a number of Spanish Ulmus minor found to have a very high resistance to Dutch Elm Disease, on a par with, if not greater than, the hybrid cultivar 'Sapporo Autumn Gold'.

<i>Ulmus minor</i> Majadahonda Elm cultivar

The field elm cultivar Ulmus minor 'Majadahonda' was cloned by grafting scions from a tree found growing in the suburb of Majadahonda, 16 km north-west of Madrid, by researchers at the Escuela Técnica Superior de Ingenieros de Montes, Universidad Politėcnica de Madrid in 1993. The tree is one of a number found to have a very high resistance to Dutch Elm Disease, on a par with, if not greater than, the hybrid cultivar 'Sapporo Autumn Gold'. In the Madrid study, the appearance of the tree was rated 4.1 / 5.

<i>Ulmus</i> Fuente Umbria Elm cultivar

The cultivar Ulmus 'Fuente Umbria' was raised from seed collected in 1995 from an elm resembling Ulmus minor growing in a field at Fuente Umbria west of Valencia, by researchers at the Escuela Técnica Superior de Ingenieros de Montes, Universidad Politėcnica de Madrid. 'Fuente Umbria' is one of seven cultivars found to have a very high resistance to Dutch Elm Disease, on a par with, if not greater than, the hybrid cultivar 'Sapporo Autumn Gold'. However, retrospective DNA analysis has revealed that the clone has Ulmus pumila DNA, the species introduced to Spain at the end of the 16th century, and has consequently been dropped from the programme.

<i>Ulmus minor</i> Retiro Elm cultivar

The Field Elm cultivar Ulmus minor 'Retiro' was raised from seed collected in 2002 from a tree growing in the El Retiro park, in the centre of Madrid by researchers at the Escuela Técnica Superior de Ingenieros de Montes, Universidad Politėcnica de Madrid.

<i>Ulmus</i> Toledo Elm cultivar

The elm cultivar Ulmus 'Toledo' was raised from seed collected in 1999 from a tree believed to be Ulmus minor growing in the eponymous city, by researchers at the Escuela Técnica Superior de Ingenieros de Montes, Universidad Politėcnica de Madrid. However, retrospective DNA analysis revealed that the clone also had Ulmus pumila DNA, the species introduced to Spain at the end of the 16th century, and has consequently been dropped from the research programme.

References

  1. 1 2 3 4 Martín, JA; Solla, A; Venturas, M; Collada, C; Domínguez, J; Miranda, E; Fuentes, P; Burón, M; Iglesias, S; Gil, L (2015-04-01). "Seven Ulmus minor clones tolerant to Ophiostoma novo-ulmi registered as forest reproductive material in Spain". IForest - Biogeosciences and Forestry. Italian Society of Sivilculture and Forest Ecology (SISEF). 8 (2): 172–180. doi: 10.3832/ifor1224-008 . ISSN   1971-7458.
  2. 1 2 Brookes, A. H. (2022). Great Fontley Elm Trial, 2022 Report. Butterfly Conservation, Lulworth, England.