{"id":{"repo_id":"uiuc","oai_identifier":"oai:www.ideals.illinois.edu:2142/71610"},"canonical_url":"https://search.dev.ndltd.org/etd/uiuc/oai:www.ideals.illinois.edu:2142/71610","repository":{"repo_id":"uiuc","name":"University of Illinois - Urbana-Champaign","base_url":"https://www.ideals.illinois.edu/oai-pmh"},"display":{"title":"Evaluation of Soil Compaction, Plant Density, and Resistance to Phytophthora Root Rot in Soybeans","abstract":"Phytophthora root rot, caused by Phytophthora megasperma f. sp. glycinea Kuan and Erwin, is a soil-borne fungal disease of soybean Glycine max (L.) Merr. . Studies were conducted to determine the effects of soil compaction on phytophthora incidence, to determine if reduced soybean stand due to phytophthora is the only factor responsible for yield reduction, and to study the inheritance of resistance to phytophthora in the plant introduction (PI) 92718-2.","abstract_html":"Phytophthora root rot, caused by Phytophthora megasperma f. sp. glycinea Kuan and Erwin, is a soil-borne fungal disease of soybean Glycine max (L.) Merr. . Studies were conducted to determine the effects of soil compaction on phytophthora incidence, to determine if reduced soybean stand due to phytophthora is the only factor responsible for yield reduction, and to study the inheritance of resistance to phytophthora in the plant introduction (PI) 92718-2.","abstract_has_math":false,"creators":["Moots, Craig Keith"],"institution":"University of Illinois at Urbana-Champaign","degree_name":"Ph.D.","degree_level":"Dissertation","degree_discipline":"Agronomy","degree_department":null,"school":null,"contributors":[],"advisors":[],"committee_chairs":[],"committee_members":[],"year":2014,"date_issued":"2014-12-16T19:03:30Z","date_published":"2014-12-16T19:03:30Z","updated_at":"2026-07-22T22:26:05Z","subjects":["Agriculture, Agronomy"],"languages":[],"rights":[],"rights_urls":[],"identifier_entries":[{"key":"dc:identifier","label":"Identifier","values":["(UMI)AAI8521840"],"render_values":[{"text":"(UMI)AAI8521840","href":null,"code":true}]}]},"links":{"outbound_url":"http://hdl.handle.net/2142/71610","outbound_label":"Handle","outbound_source":"dc:identifier"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:creator","label":"Author","values":["Moots, Craig Keith"]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"dc:date","label":"Dc Date","values":["2014-12-16T19:03:30Z","10000-01-01","1985"]},{"key":"dc:type","label":"Dc Type","values":["text"]},{"key":"thesis:degree_discipline","label":"Discipline","values":["Agronomy"]},{"key":"thesis:degree_level","label":"Degree Level","values":["Dissertation"]},{"key":"thesis:degree_name","label":"Degree Name","values":["Ph.D."]},{"key":"thesis:institution_name","label":"Thesis Institution Name","values":["University of Illinois at Urbana-Champaign"]}]},{"id":"subjects_keywords","label":"Subjects and Keywords","entries":[{"key":"dc:subject","label":"Dc Subject","values":["Agriculture, Agronomy"]}]},{"id":"identifiers","label":"Identifiers","entries":[{"key":"dc:identifier","label":"Identifier","values":["http://hdl.handle.net/2142/71610","(UMI)AAI8521840"]}]},{"id":"additional","label":"Additional Metadata","entries":[{"key":"dc:description","label":"Description","values":["Phytophthora root rot, caused by Phytophthora megasperma f. sp. glycinea Kuan and Erwin, is a soil-borne fungal disease of soybean Glycine max (L.) Merr. . Studies were conducted to determine the effects of soil compaction on phytophthora incidence, to determine if reduced soybean stand due to phytophthora is the only factor responsible for yield reduction, and to study the inheritance of resistance to phytophthora in the plant introduction (PI) 92718-2.","Field studies conducted for two years found that soil compaction significantly increased incidence of phytophthora. Increased disease incidence due to soil compaction helped differentiate susceptible from resistant cultivars. Soil compaction may be useful in field evaluations to aid in identifying susceptible soybean lines.","Comparisons of the phytophthora susceptible cultivar 'Corsoy' and artificial removal of plants in the resistant isoline L27 indicated factors other than stand reduction contributed to yield reduction in two of the three environments tested. In the third environment, which had the lowest disease incidence, stand reduction was the most critical factor influencing yield reduction from phytophthora.","Inheritance studies involving PI 92718-2 found three genes controlling resistance to phytophthora physiologic races 1, 2, and 3; two genes for races 4, 6, and 8; and a single gene controlling resistance to races 5, 7, 9, and 16 in PI 92718-2. Phytophthora resistance genes in PI 92718-2 were found allelic to Rps(,1), Rps(,4), and Rps(,6). Information gained on the inheritance of resistance and allelic relationships of resistance genes in PI 92718-2 will aid in its use as a source of phytophthora resistance.","Made available in DSpace on 2014-12-16T19:03:30Z (GMT). No. of bitstreams: 1 8521840.pdf: 2379103 bytes, checksum: bc2306a1b5229d1d8d80defa415eab2c (MD5) Previous issue date: 1985","Embargo set by: Seth Robbins for item 71776 Lift date: Forever Reason: Restricted to the U of I community idenfinitely during batch ingest of legacy ETDs","Restricted to the U of I community indefinitely during batch ingest of legacy ETDs","U of I Only","85 p.","Thesis (Ph.D.)--University of Illinois at Urbana-Champaign, 1985."]},{"key":"dc:title","label":"Title","values":["Evaluation of Soil Compaction, Plant Density, and Resistance to Phytophthora Root Rot in Soybeans"]}]}],"canonical_facts":{"dc:creator":["Moots, Craig Keith"],"dc:date":["2014-12-16T19:03:30Z","10000-01-01","1985"],"dc:description":["Phytophthora root rot, caused by Phytophthora megasperma f. sp. glycinea Kuan and Erwin, is a soil-borne fungal disease of soybean Glycine max (L.) Merr. . Studies were conducted to determine the effects of soil compaction on phytophthora incidence, to determine if reduced soybean stand due to phytophthora is the only factor responsible for yield reduction, and to study the inheritance of resistance to phytophthora in the plant introduction (PI) 92718-2.","Field studies conducted for two years found that soil compaction significantly increased incidence of phytophthora. Increased disease incidence due to soil compaction helped differentiate susceptible from resistant cultivars. Soil compaction may be useful in field evaluations to aid in identifying susceptible soybean lines.","Comparisons of the phytophthora susceptible cultivar 'Corsoy' and artificial removal of plants in the resistant isoline L27 indicated factors other than stand reduction contributed to yield reduction in two of the three environments tested. In the third environment, which had the lowest disease incidence, stand reduction was the most critical factor influencing yield reduction from phytophthora.","Inheritance studies involving PI 92718-2 found three genes controlling resistance to phytophthora physiologic races 1, 2, and 3; two genes for races 4, 6, and 8; and a single gene controlling resistance to races 5, 7, 9, and 16 in PI 92718-2. Phytophthora resistance genes in PI 92718-2 were found allelic to Rps(,1), Rps(,4), and Rps(,6). Information gained on the inheritance of resistance and allelic relationships of resistance genes in PI 92718-2 will aid in its use as a source of phytophthora resistance.","Made available in DSpace on 2014-12-16T19:03:30Z (GMT). No. of bitstreams: 1 8521840.pdf: 2379103 bytes, checksum: bc2306a1b5229d1d8d80defa415eab2c (MD5) Previous issue date: 1985","Embargo set by: Seth Robbins for item 71776 Lift date: Forever Reason: Restricted to the U of I community idenfinitely during batch ingest of legacy ETDs","Restricted to the U of I community indefinitely during batch ingest of legacy ETDs","U of I Only","85 p.","Thesis (Ph.D.)--University of Illinois at Urbana-Champaign, 1985."],"dc:identifier":["http://hdl.handle.net/2142/71610","(UMI)AAI8521840"],"dc:subject":["Agriculture, Agronomy"],"dc:title":["Evaluation of Soil Compaction, Plant Density, and Resistance to Phytophthora Root Rot in Soybeans"],"dc:type":["text"],"thesis:degree_discipline":["Agronomy"],"thesis:degree_level":["Dissertation"],"thesis:degree_name":["Ph.D."],"thesis:institution_name":["University of Illinois at Urbana-Champaign"]},"updated_at":"2026-07-22T22:26:05Z"}