Kruisingen met Trifolium pratense L.

F.E. Nijdam

Research output: Thesisinternal PhD, WU


With few exceptions, red clover is self-incompatible. Reciprocal crosses between 30 pairs of unrelated parents sampled in a population, were all compatible. Three full-sib F2's from one of these crosses showed, in 8 x 8 diallel crosses, 2, 2 and 4 incompatibility groups, and an F5 showed, in a 15 x 15 diallel cross, 2 incompatibility groups. The data were explained by a (large) series of S alleles, as proposed by East for Nicotiana and by Filzer for Veronica.
In a number of progenies, male-sterility (degenerate anthers) was found and a recessive factor was identified.

Seed-coat colour (yellow versus violet) was polymerically controlled (up to 5 cumulative factors), complicated by environmental and within-plant variation. In certain progenies a factor for violet (v) and an intensifier (X) could be identified. The quality of yellow and of violet was controlled by C-c and by R-r, respectively.

Flower colour was determined by the factor G for anthocyanin production and by B-b for purple or pink, along with at least 3 intensifiers of purple.

Two chlorophyll abnormalities depended on recessive factors (chlorina and albina) and one was plasmatically inherited (albomaculata). Two types of dwarfs (nanella and nana) were single recessives.
Original languageDutch
QualificationDoctor of Philosophy
Awarding Institution
  • Wageningen University
  • Honing, J.A., Promotor, External person
Award date6 Jul 1932
Place of Publication's-Gravenhage
Publication statusPublished - 1932
Externally publishedYes


  • chromosomes
  • heritability
  • inheritance
  • trifolium pratense
  • incompatibility
  • compatibility
  • self incompatibility

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