Genetic variation and heritability estimates of Ulmus minor and Ulmus pumila hybrids for budburst, growth and tolerance to Ophiostoma novo-ulmi

Solla, Alejandro; López Almansa, Juan Carlos; Martin Garcia, Juan Antonio y Gil Sanchez, Luis Alfonso (2014). Genetic variation and heritability estimates of Ulmus minor and Ulmus pumila hybrids for budburst, growth and tolerance to Ophiostoma novo-ulmi. "Iforest", v. 8 ; pp. 422-430. ISSN 1971-7458. https://doi.org/10.3832/ifor1227-007.

Descripción

Título: Genetic variation and heritability estimates of Ulmus minor and Ulmus pumila hybrids for budburst, growth and tolerance to Ophiostoma novo-ulmi
Autor/es:
  • Solla, Alejandro
  • López Almansa, Juan Carlos
  • Martin Garcia, Juan Antonio
  • Gil Sanchez, Luis Alfonso
Tipo de Documento: Artículo
Título de Revista/Publicación: Iforest
Fecha: 2014
Volumen: 8
Materias:
Palabras Clave Informales: Quantitative Genetics, Tree Breeding, Invasive Pathogen, Inheritance, Additive Genetic Variance, Non-additive Genetic Variance, Heterosis,Genetic Gain
Escuela: E.T.S.I. Montes (UPM) [antigua denominación]
Departamento: Sistemas y Recursos Naturales
Licencias Creative Commons: Reconocimiento - Sin obra derivada - No comercial

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Resumen

Seedlings obtained by crossing Ulmus minor and U. minor × U. pumila clones were assessed for flowering, bark beetle damage, vegetative budburst, height growth and resistance to Ophiostoma novo-ulmi. Ramets and open pollinated seedlings obtained from the parent trees were assessed for the same traits. Most progenies had similar traits to their parents, but some presented heterosis in annual growth or resistance to O. novo-ulmi. Leaf wilting was significantly lower in progenies with U. minor × U. pumila rather than U. minor as female parent (21.5 and 30.6%, respectively; P<0.05). Resistance to O. novoulmi increased significantly as a function of increased amounts of U. pumila germplasm from the female parent, suggesting that resistance to Dutch elm disease is primarily transmitted from the mother. Budburst occurred earlier in seedlings with low rather than high growth rates (P=0.0007) and percentage of wilting was negatively related to early budburst (P<0.0001). Other phenotypic relations included percentage of flowering trees and annual height growth (rp=0.44; P=0.0042), percentage of flowering trees and vegetative budburst (rp=-0.53; P=0.0004) and percentage of beetle-affected trees and annual height growth (rp=0.60; P<0.0001). Heritability estimates obtained from the regression and variance components methods ranged from 0.06 ± 0.04 to 0.64 ± 0.18, 0.10 ± 0.05 to 0.69 ± 0.17, and 0.13 ± 0.32 to 0.71 ± 0.22 for budburst, growth and tolerance to O. novo-ulmi, respectively. Broad- and narrowsense heritability values were higher when estimated 60 days post inoculation (dpi) than 15, 30 or 120 dpi. Heritability estimates and genetic gains reported indicate a high degree of additive genetic control and show the effectiveness of selection for Dutch elm disease resistance and rapid tree growth.

Más información

ID de Registro: 41012
Identificador DC: http://oa.upm.es/41012/
Identificador OAI: oai:oa.upm.es:41012
Identificador DOI: 10.3832/ifor1227-007
URL Oficial: http://www.sisef.it/iforest/contents/?id=ifor1227-007
Depositado por: Memoria Investigacion
Depositado el: 31 Ago 2016 08:51
Ultima Modificación: 31 Ago 2016 08:51
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