Summary
Ten varieties of Triticum aestivum and three synthetic T. durum + Aegilops squarrosa Footnote 1 hexaploids were crossed with an Ae. bicornis + Ae. squarrosa amphiploid. 55 hybrid plants involving 9 different combinations developed necrosis and died before maturity. The two plants which survived were both from the F1 with a synthetic hexaploid, T. durum var. Carleton + Ae. squarrosa.
The genetic necrosis developing in these hybrids differed from hybrid necrosis and red hybrid chlorosis both in symptoms and in the genetic basis. The symptoms were similar to those reported for a number of Triticum x Aegilops hybrids in which Ae. bicornis and Ae. squarrosa were involved but the genetic basis was not determined. The survival of 2 of the 13 progenies from one cross is discussed.
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Notes
The + sign indicates an amphiploid.
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Siddiqui, K.A., Jones, J.K. Genetic necrosis in Triticum × aegilops pentaploid hybrids. Euphytica 18, 71–78 (1969). https://doi.org/10.1007/BF00021984
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DOI: https://doi.org/10.1007/BF00021984