The Genetics of Self-Incompatibility in the Radish

Sampson, D. R.

doi:10.1093/oxfordjournals.jhered.a106672

Cited by 43 publications

(30 citation statements)

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“…Similar dominance differences have been found by Hinata and Nishio (1978). Sampson (1957Sampson ( , 1964 with Brassica campestris and R. raphanistrum found several differences in dominance and concluded that modifiers were acting in both pollen and stigma to alter the dominance of S alleles. Dominance modification, therefore, appears to be a common feature of the S system, and the cleancut segregation of different types of dominance in a family supports a genetic origin.…”

Section: Modification Of S Dominancesupporting

confidence: 74%

“…The results in all the published work on this system, in as many as seven different species, contain a significant proportion of unexpected and unexplained anomalies, frequently in the nature of a positive result where a negative is expected (Hughes and Babcock, 1950;Bateman, 1954;Sampson, 1956Sampson, , 1964Putrament, 1960;Kroh 1956;Verma et al, 1977;Hinata and Nishio, 1978). In another major incompatibility system, the gametophytic system, such unexpected results are rare and usually totally absent (cf.…”

Section: Introductionmentioning

confidence: 99%

“…Raphanus sativus was chosen for the study of these anomalies because Sampson (1957) and Putrament (1960) had obtained many exceptional results which could not be explained on a single S gene hypothesis. We used, therefore, material similar to that of Putranient (1960).…”

Section: Introductionmentioning

confidence: 99%

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Gametophytic–sporophytic incompatibility in the Cruciferae–Raphanus sativus

1988

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Section: Modification Of S Dominancesupporting

confidence: 74%

Section: Introductionmentioning

confidence: 99%

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Gametophytic–sporophytic incompatibility in the Cruciferae–Raphanus sativus

1988

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“…With the exception of members of the Cruciferae (Bateman, 1955;Sampson, 1957) and Compositae (Gerstel, 1950;Hughes and Babcock, 1950;Crowe, 1954;Sampson, 1964;Lloyd, 1967) which have a sporophytic system, the pollen reaction type is determined gametophytically and depends on the alleles at a single S locus (East and Mangelsdorf, 1925), or at more than one locus (Lundqvist, 1954(Lundqvist, , 1975Hayman, 1956). The present paper is concerned with single-locus gametophytic systems.…”

Section: Introductionmentioning

confidence: 99%

The evolution and breakdown of S-allele systems

1979

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SUMMARYWe have examined a model proposed by East (1929) for the evolution of gametophytic self-incompatibility allele systems, starting from populations with a self-fertility allele. The original self-fertility allele is not eliminated from the population when three active S alleles have been incorporated, but self-fertility alleles can coexist with S alleles. In order to examine this coexistence more fully, we studied the invasion of self-incompatible populations containing various numbers of S alleles (all assumed to be equally frequent) by three possible types of self-compatibility factors that could arise by mutation at the S locus. We find that there is always some critical number of active S alleles that ensures the elimination of mutant alleles with no activity in pollen; this number depends on the inbreeding depression. Alleles abolishing the stigma activity can spread, irrespective of how many active alleles are present, provided the inbreeding depression is small enough. Some of the biological implications of these results are discussed.

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“…(1977) in which at least three 5-loci were implicated. Additionally, the number of S-loci has been disputed in Raphanus sativus (Sampson, 1957b; Lewis, 1979) and R. raphanistrum (see Sampson, 1964). …”

Section: Introductionmentioning

confidence: 99%

The number of loci controlling the sporophytic self-incompatibility system in Sinapis arvensis L.

Stevens

Kay

1988

Heredity

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A breeding programme designed to establish the number of loci controlling the sporophytic self-incompatibility system in Sinapis arvensis has been completed. The programme involved analyses of diallel crosses within F1 and F2 families derived from crosses between plants from geographically remote populations, and within self families derived from the parental plants. Incompatibility reactions were determined cytologically using fluorescence microscopy. Control by a single locus has been established. However, the expression of individual S-alleles may be modified, as shown by incomplete dominance in a self family, and mutual weakening in an F1 family.

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The Genetics of Self-Incompatibility in the Radish

Cited by 43 publications

References 0 publications

Gametophytic–sporophytic incompatibility in the Cruciferae–Raphanus sativus

Gametophytic–sporophytic incompatibility in the Cruciferae–Raphanus sativus

The evolution and breakdown of S-allele systems

The number of loci controlling the sporophytic self-incompatibility system in Sinapis arvensis L.

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