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Evidence of natural hybridization between Aegilops geniculata and wheat under field conditions in Central Spain

Published online by Cambridge University Press:  23 January 2007

Iñigo Loureiro ,
María Concepción Escorial ,
José María García-Baudín  and
María Cristina Chueca
Iñigo Loureiro
Affiliation:
Dpto. Protección Vegetal. INIA. Ctra. La Coruña Km. 7.5, 28040 Madrid, Spain
María Concepción Escorial
Affiliation:
Dpto. Protección Vegetal. INIA. Ctra. La Coruña Km. 7.5, 28040 Madrid, Spain
José María García-Baudín
Affiliation:
Dpto. Protección Vegetal. INIA. Ctra. La Coruña Km. 7.5, 28040 Madrid, Spain
María Cristina Chueca
Affiliation:
Dpto. Protección Vegetal. INIA. Ctra. La Coruña Km. 7.5, 28040 Madrid, Spain

Abstract

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This study deals with hybrids between Aegilops geniculata and bread wheat, Triticum aestivum L., detected in two Ae. geniculata populations in the “Meseta Central”, Spain’s central plateau where wheat is a major crop. Morphological traits and pentaploid chromosome numbers were used to identify hybrids in 2004 and 2005. The frequency of hybridization under natural conditions was calculated for one of these populations. Six hybrids were detected from a sample of 3158 seeds from this population. The hybrids were mainly sterile but seed set can be found. This study extends the range of documented hybridization to include central Spain. The potential risks associated with natural hybridization in the context of transgenic wheat cultivation are discussed.

Keywords

Biosafetycrop-wild hybridshybridization ratepollen flowTriticum aestivum
Type
Research Article
Information
Environmental Biosafety Research , Volume 5 , Issue 2 , April 2006 , pp. 105 - 109
Copyright
© ISBR, EDP Sciences, 2006

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