Open AccessOn the occurrence of unilateral incompatibility in Primula section Aleuritia Duby and the origin of Primula scotica Hook.
Author(s) -
ARNOLD E. S.,
RICHARDS A. J.
Publication year - 1998
Publication title -
botanical journal of the linnean society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.872
H-Index - 68
eISSN - 1095-8339
pISSN - 0024-4074
DOI - 10.1111/j.1095-8339.1998.tb02126.x
Subject(s) - primula , biology , heterostyly , botany , ovule , ploidy , pollen , reciprocal cross , hook , genetics , hybrid , pollination , structural engineering , engineering , gene
The occurrence of unilateral incompatibility was tested for a distylous heteromorphic system, using crosses between a self‐sterile and three self‐fertile species in Primula L. section Aleuritia Duby. The crosses showed non‐reciprocity but not in the same direction as would be predicted in the case of unilateral incompatibility. Pollen from the self‐compatible (s‐c) species was not always inhibited on the style of the self‐incompatible (s‐i) species, and cross‐fertility between s‐i and s‐c crosses more resembled that between different s‐c species, which was also non‐reciprocal. Cytoplasmic‐nuclear DNA interactions and the possibility of embryo‐endosperm imbalance could both explain these results. In crosses between Primula farinosa L. (s‐i diploid) and P. scotica Hook. (s‐c hexaploid), heterostylous pin tetraploid offspring were produced. This result is discussed in relation to the genome of P. scotica and the possibility that pin morph plants may occur in wild P scotica populations.