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A new type of hybrid chlorosis found in tetraploid wheats



A new type of hybrid chlorosis found in tetraploid wheats



Jap J Genet 43(4): 279-288



A new type of progressive chlorosis was found to occur in reciprocal F1 hybrids between Triticum dicoccum cultivar "Hokudai" (2n = 28, genome formula AABB) and T. timopheevi var. 'typicum' strain NIG (2n= 28, AAGG), and it was named "chlorosis type 2". Two complementary genes, Chl 1 and Chl 2 , caused chlorosis type 2. Out of 20 emmer wheats, only T. dicoccum cultivar 'Hokudai' possessed the Chl 1 gene, while all the others carried its recessive allele. All strains of T. timopheevi had the Chl 2 gene which was never found in emmer wheat. Thus, it was clear that T. timopheevi is distinctly different from emmer wheat as to its population structure for the chlorosis genes.

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Accession: 014317250

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DOI: 10.1266/jjg.43.279


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