Resistance to the cereal cyst nematode (Heterodera avenae) transferred from the wild grass Aegilops ventricosa to hexaploid wheat by a "stepping-stone" procedure

Delibes Castro, Angeles and Romero, D. and Aguaded, S. and Duce, A. and Mena, M. and Lopez Braña, Isidoro and Andrés, María Fe and Martín-Sánchez, J.A. and García Olmedo, Francisco (1993). Resistance to the cereal cyst nematode (Heterodera avenae) transferred from the wild grass Aegilops ventricosa to hexaploid wheat by a "stepping-stone" procedure. "TAG Theorical and Applied Genetics", v. 87 (n. 3); pp. 402-408. ISSN 0040-5752. https://doi.org/10.1007/BF01184930.

Description

Title: Resistance to the cereal cyst nematode (Heterodera avenae) transferred from the wild grass Aegilops ventricosa to hexaploid wheat by a "stepping-stone" procedure
Author/s:
  • Delibes Castro, Angeles
  • Romero, D.
  • Aguaded, S.
  • Duce, A.
  • Mena, M.
  • Lopez Braña, Isidoro
  • Andrés, María Fe
  • Martín-Sánchez, J.A.
  • García Olmedo, Francisco
Item Type: Article
Título de Revista/Publicación: TAG Theorical and Applied Genetics
Date: November 1993
ISSN: 0040-5752
Volume: 87
Subjects:
Faculty: E.T.S.I. Agrónomos (UPM) [antigua denominación]
Department: Biotecnologia [hasta 2014]
Creative Commons Licenses: Recognition - No derivative works - Non commercial

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Abstract

Transfer of resistance toHeterodera avenae, the cereal cyst nematode (CCN), by a stepping-stoneprocedure from the wild grassAegilops ventricosa to hexaploid wheat has been demonstrated. The number of nematodes per plant was lower, and reached a plateau much earlier, in the resistant introgression line H93-8 (1–2 nematodes per plant) than in the recipient H10-15 wheat (14–16 nematodes per plant). Necrosis (hypersensitive reaction) near the nematode, little cell fusion, and few, often degraded syncytia were observed in infested H93-8 roots, while abundant, well-formed syncytia were present in the susceptible H10-15 wheat. Line H93-8 was highly resistant to the two Spanish populations tested, as well as the four French races (Fr1-Fr4), and the British pathotype Hall, but was susceptible to the Swedish pathotypes HgI and HgIII. Resistance was inherited as though determined by a single quasi-dominant factor in the F2 generations resulting from crosses of H93-8 with H10-15 and with Loros, a resistant wheat carrying the geneCre1 (syn.Ccn1). The resistance gene in H93-8 (Cre2 orCcn2) is not allelic with respect to that in Loros. RFLPs and other markers, together with the cytogenetical evidence, indicate that theCre2 gene has been integrated into a wheat chromosome without affecting its meiotic pairing ability. Introduction ofCre2 by backcrossing into a commercial wheat backgroud increases grain yield when under challenge by the nematode and is not detrimental in the absence of infestation.

More information

Item ID: 6024
DC Identifier: http://oa.upm.es/6024/
OAI Identifier: oai:oa.upm.es:6024
DOI: 10.1007/BF01184930
Official URL: http://springerlink.metapress.com/content/w8265377p54721q2/
Deposited by: Memoria Investigacion
Deposited on: 16 Feb 2011 10:34
Last Modified: 20 Apr 2016 14:40
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