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Utilization of deletions to localize a gene for resistance to the cereal cyst nematode, Heterodera avenue , on an Aegilops ventricosa chromosome
Author(s) -
Jahier J.,
Tanguy A. M.,
Abelard P.,
Rivoal R.
Publication year - 1996
Publication title -
plant breeding
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.583
H-Index - 71
eISSN - 1439-0523
pISSN - 0179-9541
DOI - 10.1111/j.1439-0523.1996.tb00919.x
Subject(s) - biology , chromosome , genetics , nematode , aegilops , gene , heterodera , restriction fragment length polymorphism , common wheat , ploidy , botany , genotype , ecology
A previous RFLP analysis showed that the Aegilops ventricosa chromosome 6M V which compensates for the absence of 6D in 6M V (6D) wheat substitution lines was a 2/6 translocated chromosome, either 2S–6S.6L or 2S–6L.6S. The distal part of its long arm consists of a translocated segment belonging to homoeologous group 2. Chromosome 6M V carries a gene(s) for resistance to cereal cyst nematode. In order to define the part of 6M V (2S or 6S or 6L) involved in this resistance, addition lines with a 6M V deleted either for its short arm or for the distal part of its long arm were evaluated. It was shown that the gene(s) is carried by the group 2 translocated segment. The hypothesis that the gene(s) could be allelic to Cre2 , another gene conferring resistance to the nematode introduced into the wheat complement from Ae. ventricosa is discussed.