Summary
Generally durum wheat flowers are chasmogamous but very rarely, cleistogamy may be observed. Genetic studies based on six crosses and back crosses showed that chasmogamy was determined by a single dominant gene Cl, plants homozygous for the recessive allele, cl, were cleistogamous. The flowering behaviour phenotypes were unaffected by environmental conditions. Cleistogamy was attributed to poorly developed lodicules and stiff perianth.
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Chhabra, A.K., Sethi, S.K. Inheritance of cleistogamic flowering in durum wheat (Triticum durum). Euphytica 55, 147–150 (1991). https://doi.org/10.1007/BF00025227
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DOI: https://doi.org/10.1007/BF00025227