<p/>γrays, X rays, fast neutrons and ethyl methanesulfonate (EMS) were used for inducing mutations at the self-incompatibility locus of <em>Nicotiana alata.</em><p/>Chronic gamma irradiation and EMS treatment neither induced selfcompatibility mutations nor led to changes from one S allele to another. X rays and fast neutrons induced many self-compatibility mutations, but did not generate new self-incompatibility alleles.<p/>Triploid individuals were male sterile.<p/>Tri(S)allelic aneuploid plants were self-incompatible because heterogenic di(S)allelic pollen grains are not functional.<p/>Self-compatibility in pollen-part mutants with and without a centric fragment was explained by complementation of the mutant S allele by a fragment or duplication. Deviations of expected segregation ratios were explained by lethality of S homozygotes.<p/>It was shown that the longest unsatellited acrocentric chromosome is the S-bearing chromosome.
|Qualification||Doctor of Philosophy|
|Award date||28 May 1976|
|Place of Publication||Wageningen|
|Publication status||Published - 1976|
- self compatibility