Cytoplasmic homology between Aegilops mutica
Boiss. and Ae. ovata L. |
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Authors: | S S Maan |
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Institution: | (1) Department of Agronomy, North Dakota State University, 58102 Fargo, North Dakota, USA |
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Abstract: | Summary
Triticum aestivum L. em Thell. (2n=42; AABBDD), and T. durum
Desf. (2n=28; AABB) genomes were substituted into the cytoplasms of Aegilops mutica
Boiss. (2n=14; MtMt), Ae. heldreichii
Holzm. (2n=14; MM), Ae. uniaristata
Vis. (2n=14; MuMu), and Ae. ovata L. (2n=28; CuCuMoMo), to identify the M-genome diploid cytoplasm donor of Ae. ovata. Substitution of the T. durum genome into Ae. uniaristata cytoplasm resulted in a large proportion of shriveled inviable seeds. A few plump viable seeds were obtained all of which produced male-sterile plants having one univalent or telocentric chromosome from Ae. uniaristata. The T. aestivum plants having Ae. uniaristata or Ae. mutica cytoplasms were fertile. However, Ae. mutica was similar to Ae. ovata in the induction of delayed maturity and tall robust growth habit to the T. durum and T. aestivum plants. Cytoplasms of the other C- and M-genome diploids Ae. umbellulata
Zhuk. (2n=14; CuCu) and, Ae. heldreichii (2n=14; MM) earlier had been shown to differ from that of Ae. ovata. Therefore, Ae. mutica is the most likely cytoplasm and M-genome donor to Ae. ovata. |
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Keywords: | Aegilops mutica Aegilops ovata cytoplasmic homology nucleo-cytoplasmic interactions cytoplasmic effects genome substitution Triticum alloplasmic wheat |
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