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Abstract
SUMMARYAmong the several aspects investigated in the programme of studies on induced mutagenesis in Triticum durum, cytological analysis of mutant progenies has been particularly taken into consideration. Data obtained from microsporogenesis, pollen fertility and seed setting analysis of heterozygotes for reciprocal translocations, allowed a general appraising on the relation of translocation heterozygosis to gametic fertility.Complexively more than 50 different translocations were investigated in M3, M4 and F1 material from crosses of mutants to mother line.A much higher fertility than expected on theoretical basis was found in traslocation heterozygotes. From data obtained it seems that the deficiency — duplications originated in a micro- or macroscopore following an adjacent segregation of chromosomes tied in a translocation complex, do not lead in Triticum durum to the gametic sterility generally found in other species. Several factors influencing fertility in individual heterozygous for a translocati...
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