The presence of a self-incompatibility (SI) system in the polyploid crucifer, Cheiranthus allionii = Siberian wallflower, was suggested by results of greenhouse screening and confirmed by results of controlled pollinations in the field. Sporophytic control of the system was indicated by a stigmatic barrier to incompatible pollen tube growth, seen in scanning electron micrographs, and by differences in reciprocal cross-compatibilities. Strength of the SI system varied, but no completely self-compatible plants were found. Marked segregation for SI level within self- and cross-progenies of a plant with weak SI suggested that weak SI might be due to a single gene. The strength of the SI system was stable through one generation of selfing. However, no evidence of inbreeding depression on number of seeds per open-pollinated silique was observed. SI levels were independent of open-pollinated fertility levels. The use of heterogeneous material emphasized the advantage of a relative measure of SI level.
Concentrated sucrose solutions (30% w/w) supported pollen germination and tube elongation. Stigma surface components, leached directly into the germination medium, delayed or inhibited germination of incompatible pollen.
This organism provides a tool for the study of SI in heterogeneous populations of a natural polyploid and for the study of interactions between pollen and stigma components.
","abstract_html":"<p>The presence of a self-incompatibility (SI) system in the polyploid crucifer, Cheiranthus allionii = Siberian wallflower, was suggested by results of greenhouse screening and confirmed by results of controlled pollinations in the field. Sporophytic control of the system was indicated by a stigmatic barrier to incompatible pollen tube growth, seen in scanning electron micrographs, and by differences in reciprocal cross-compatibilities. Strength of the SI system varied, but no completely self-compatible plants were found. Marked segregation for SI level within self- and cross-progenies of a plant with weak SI suggested that weak SI might be due to a single gene. The strength of the SI system was stable through one generation of selfing. However, no evidence of inbreeding depression on number of seeds per open-pollinated silique was observed. SI levels were independent of open-pollinated fertility levels. The use of heterogeneous material emphasized the advantage of a relative measure of SI level.</p><p>Concentrated sucrose solutions (30% w/w) supported pollen germination and tube elongation. Stigma surface components, leached directly into the germination medium, delayed or inhibited germination of incompatible pollen.</p><p>This organism provides a tool for the study of SI in heterogeneous populations of a natural polyploid and for the study of interactions between pollen and stigma components.</p>","abstract_has_math":false,"creators":["CHANEY, LEE ANNE"],"institution":null,"degree_name":"Doctor of Philosophy","degree_level":"Dissertation","degree_discipline":null,"degree_department":null,"school":null,"contributors":[],"advisors":[],"committee_chairs":[],"committee_members":[],"year":1980,"date_issued":"1980-01-01T08:00:00Z","date_published":"1980-01-01T08:00:00Z","updated_at":"2026-07-24T05:23:09Z","subjects":["Biology","Genetics"],"languages":[],"rights":[],"rights_urls":[],"identifier_entries":[]},"links":{"outbound_url":"https://scholars.unh.edu/dissertation/1277","outbound_label":"Repository record","outbound_source":"dc:identifier"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:creator","label":"Author","values":["CHANEY, LEE ANNE"]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"thesis:degree_level","label":"Degree Level","values":["Dissertation"]},{"key":"thesis:degree_name","label":"Degree Name","values":["Doctor of Philosophy"]}]},{"id":"subjects_keywords","label":"Subjects and Keywords","entries":[{"key":"dc:subject","label":"Dc Subject","values":["Biology","Genetics"]}]},{"id":"identifiers","label":"Identifiers","entries":[{"key":"dc:identifier","label":"Identifier","values":["https://scholars.unh.edu/dissertation/1277"]}]},{"id":"additional","label":"Additional Metadata","entries":[{"key":"dc:description.abstract","label":"Abstract","values":["The presence of a self-incompatibility (SI) system in the polyploid crucifer, Cheiranthus allionii = Siberian wallflower, was suggested by results of greenhouse screening and confirmed by results of controlled pollinations in the field. Sporophytic control of the system was indicated by a stigmatic barrier to incompatible pollen tube growth, seen in scanning electron micrographs, and by differences in reciprocal cross-compatibilities. Strength of the SI system varied, but no completely self-compatible plants were found. Marked segregation for SI level within self- and cross-progenies of a plant with weak SI suggested that weak SI might be due to a single gene. The strength of the SI system was stable through one generation of selfing. However, no evidence of inbreeding depression on number of seeds per open-pollinated silique was observed. SI levels were independent of open-pollinated fertility levels. The use of heterogeneous material emphasized the advantage of a relative measure of SI level.
Concentrated sucrose solutions (30% w/w) supported pollen germination and tube elongation. Stigma surface components, leached directly into the germination medium, delayed or inhibited germination of incompatible pollen.
This organism provides a tool for the study of SI in heterogeneous populations of a natural polyploid and for the study of interactions between pollen and stigma components.
"]},{"key":"dc:title","label":"Title","values":["SELF-INCOMPATIBILITY IN CHEIRANTHUS ALLIONII"]}]}],"canonical_facts":{"dc:creator":["CHANEY, LEE ANNE"],"dc:description.abstract":["The presence of a self-incompatibility (SI) system in the polyploid crucifer, Cheiranthus allionii = Siberian wallflower, was suggested by results of greenhouse screening and confirmed by results of controlled pollinations in the field. Sporophytic control of the system was indicated by a stigmatic barrier to incompatible pollen tube growth, seen in scanning electron micrographs, and by differences in reciprocal cross-compatibilities. Strength of the SI system varied, but no completely self-compatible plants were found. Marked segregation for SI level within self- and cross-progenies of a plant with weak SI suggested that weak SI might be due to a single gene. The strength of the SI system was stable through one generation of selfing. However, no evidence of inbreeding depression on number of seeds per open-pollinated silique was observed. SI levels were independent of open-pollinated fertility levels. The use of heterogeneous material emphasized the advantage of a relative measure of SI level.
Concentrated sucrose solutions (30% w/w) supported pollen germination and tube elongation. Stigma surface components, leached directly into the germination medium, delayed or inhibited germination of incompatible pollen.
This organism provides a tool for the study of SI in heterogeneous populations of a natural polyploid and for the study of interactions between pollen and stigma components.
"],"dc:identifier":["https://scholars.unh.edu/dissertation/1277"],"dc:subject":["Biology","Genetics"],"dc:title":["SELF-INCOMPATIBILITY IN CHEIRANTHUS ALLIONII"],"thesis:degree_level":["Dissertation"],"thesis:degree_name":["Doctor of Philosophy"]},"updated_at":"2026-07-24T05:23:09Z"}