Summary
Accession No. 1 of Aegilops variabilis has complete resistance to the root knot nematode, Meloidogyne naasi. F2 segregation in a cross between this and two susceptible accessions showed that one dominant gene named Rkn-mn1 prevented development of galls on the roots and consequently of female nematodes. The study of the numbers of females in galls on the F2 plants allowed detection of a recessive gene, Rkn-mnAv, suppressing development of J2 larvae into females. The presence of Rkn-mnAv also resulted in a decrease of the level of galling. Rkn-mn1 has already been introduced into wheat. The interest in transferring also Rkn-mnAv is discussed in relation to extending durability of the nematode resistance.
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Yu, M.Q., Jahier, J. & Person-Dedryver, F. Genetics of two mechanisms of resistance to Meloidogyne naasi (FRANKLIN) in an Aegilops variabilis Eig. accession. Euphytica 58, 267–273 (1991). https://doi.org/10.1007/BF00025259
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DOI: https://doi.org/10.1007/BF00025259