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Titolo:
RESISTANCE TO THE CEREAL CYST-NEMATODE (HETERODERA-AVENAE WOLL) TRANSFERRED FROM THE WILD GRASS AEGILOPS-VENTRICOSA TO HEXAPLOID WHEAT BY ASTEPPING-STONE PROCEDURE
Autore:
DELIBES A; ROMERO D; AGUADED S; DUCE A; MENA M; LOPEZBRANA I; ANDRES MF; MARTINSANCHEZ JA; GARCIAOLMEDO F;
Indirizzi:
UPM,ETS INGN AGRON,BIOQUIM & BIOL MOLEC LAB E-28040 MADRID SPAIN UPM,ETS INGN AGRON,BIOQUIM & BIOL MOLEC LAB E-28040 MADRID SPAIN CSIC,CTR CIENCIAS MEDIOAMBIENTALES E-28006 MADRID SPAIN UDL IRTA,CTR RES & DEV LLEIDA E-25006 LLEIDA SPAIN
Titolo Testata:
Theoretical and Applied Genetics
fascicolo: 3, volume: 87, anno: 1993,
pagine: 402 - 408
SICI:
0040-5752(1993)87:3<402:RTTCC(>2.0.ZU;2-7
Fonte:
ISI
Lingua:
ENG
Keywords:
WHEAT; AEGILOPS-VENTRICOSA; HETERODERA-AVENAE; CYST NEMATODE; RESISTANCE GENE;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
21
Recensione:
Indirizzi per estratti:
Citazione:
A. Delibes et al., "RESISTANCE TO THE CEREAL CYST-NEMATODE (HETERODERA-AVENAE WOLL) TRANSFERRED FROM THE WILD GRASS AEGILOPS-VENTRICOSA TO HEXAPLOID WHEAT BY ASTEPPING-STONE PROCEDURE", Theoretical and Applied Genetics, 87(3), 1993, pp. 402-408

Abstract

Transfer of resistance to Heterodera avenae, the cereal cyst nematode(CCN), by a ''stepping-stone'' procedure from the wild grass Aegilopsventricosa 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 inthe 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 Ha11, 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 gene Cre1 (syn. Ccn1). The resistance gene in H93-8 (Cre2 or Ccn2) is not allelic with respect to that in Loros. RFLPs and other markers, together with the cytogenetical evidence, indicate that the Cre2 gene has been integrated into a wheat chromosome without affecting its meiotic pairing ability. Introduction of Cre2 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.

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Documento generato il 30/10/20 alle ore 18:38:41