{"id":{"repo_id":"tamu","oai_identifier":"oai:oaktrust.library.tamu.edu:1969.1/186309"},"canonical_url":"https://search.dev.ndltd.org/etd/tamu/oai:oaktrust.library.tamu.edu:1969.1/186309","repository":{"repo_id":"tamu","name":"Texas A&M University","base_url":"https://oaktrust.library.tamu.edu/server/oai/request"},"display":{"title":"Genotype-by-Floral Characteristics Interaction for Hybrid Wheat (Triticum aestivum L.) Production in Texas","abstract":"The demand for agricultural and natural recourses is rising due to population growth. Hybrid technology is an effective way to increase yield potential and production of wheat (Triticum aestivum L.) to meet the demand of 9.7 billion people in 2050. Self-pollinated crops are challenging due to high seed production cost and the need to force them to behave as a cross-pollinated crop. Therefore, a compromise between heterosis and floral suitability often needs to be reached in hybrid wheat production. Recently, the interest in hybrid wheat has been renewed because of higher wheat prices, climate change, new technological developments in next-generation sequencing, and capability of predicting heterosis at the molecular level. In addition, the performance potential of hybrids increased due to more focused studies on wheat flower biology. It is apparent that the redesign of floral characteristics is a prerequisite for hybrid wheat breeding to achieve high outcrossing ability. Therefore, the purpose of this research was to 1) screen the Uniform Variety Trial (UVT) and Texas Elite (TXE) lines for desirable floral characteristics, and 2) characterize the best male and female candidates for inclusion in the Texas A&M AgriLife hybrid wheat crossing blocks. The lines were screened for floral characteristics such as days to heading, days to anthesis, anther extrusion, anther score, stigma exsertion, gape, and plant height in College Station and McGregor, TX for two years. The results of combined environment analyses indicated that genotypic variances were significantly different for all floral characteristics. Non-gender and male traits had high heritability estimates. The heritability of anther extrusion ranged from 0.82 to 0.87. The non-gender and male traits exhibited highly reliable genotypic coefficient of variance (GCV), while female traits had low GCV levels. The correlation between days to heading and anthesis; anther score and anther extrusion; as well as stigma exsertion and gape were positive and significant. The lines were screened for Rht-B1 and Rht-D1 height reduction genes. Five of the UVT lines had Rht-B1a/ Rht-D1b and only one of the TXE lines had it. The rest of the lines had Rht-B1b/ Rht-D1a genes.","abstract_html":"The demand for agricultural and natural recourses is rising due to population growth. Hybrid technology is an effective way to increase yield potential and production of wheat (Triticum aestivum L.) to meet the demand of 9.7 billion people in 2050. Self-pollinated crops are challenging due to high seed production cost and the need to force them to behave as a cross-pollinated crop. Therefore, a compromise between heterosis and floral suitability often needs to be reached in hybrid wheat production. Recently, the interest in hybrid wheat has been renewed because of higher wheat prices, climate change, new technological developments in next-generation sequencing, and capability of predicting heterosis at the molecular level. In addition, the performance potential of hybrids increased due to more focused studies on wheat flower biology. It is apparent that the redesign of floral characteristics is a prerequisite for hybrid wheat breeding to achieve high outcrossing ability. Therefore, the purpose of this research was to 1) screen the Uniform Variety Trial (UVT) and Texas Elite (TXE) lines for desirable floral characteristics, and 2) characterize the best male and female candidates for inclusion in the Texas A&M AgriLife hybrid wheat crossing blocks. The lines were screened for floral characteristics such as days to heading, days to anthesis, anther extrusion, anther score, stigma exsertion, gape, and plant height in College Station and McGregor, TX for two years. The results of combined environment analyses indicated that genotypic variances were significantly different for all floral characteristics. Non-gender and male traits had high heritability estimates. The heritability of anther extrusion ranged from 0.82 to 0.87. The non-gender and male traits exhibited highly reliable genotypic coefficient of variance (GCV), while female traits had low GCV levels. The correlation between days to heading and anthesis; anther score and anther extrusion; as well as stigma exsertion and gape were positive and significant. The lines were screened for Rht-B1 and Rht-D1 height reduction genes. Five of the UVT lines had Rht-B1a/ Rht-D1b and only one of the TXE lines had it. The rest of the lines had Rht-B1b/ Rht-D1a genes.","abstract_has_math":false,"creators":["Sade, Fatma Betul"],"institution":"Texas A&M University","degree_name":"Master of Science","degree_level":"Masters","degree_discipline":"Plant Breeding","degree_department":null,"school":null,"contributors":[],"advisors":["Ibrahim, Amir M.H."],"committee_chairs":[],"committee_members":["Rudd, Jackie C.","Liu, Shuyu"],"year":2019,"date_issued":"2019-05-15","date_published":"2019-05-15","updated_at":"2026-08-21T16:48:40Z","subjects":["Hybrid wheat","Wheat Floral Traits"],"languages":["en"],"rights":[],"rights_urls":[],"identifier_entries":[]},"links":{"outbound_url":"https://hdl.handle.net/1969.1/186309","outbound_label":"Handle","outbound_source":"dc:identifier.uri"},"source_record":{"url":"https://oaktrust.library.tamu.edu/server/oai/request?verb=GetRecord&metadataPrefix=dim&identifier=oai%3Aoaktrust.library.tamu.edu%3A1969.1%2F186309","prefix":"dim"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:contributor.advisor","label":"Advisor","values":["Ibrahim, Amir M.H."]},{"key":"dc:contributor.committeemember","label":"Committee Member","values":["Rudd, Jackie C.","Liu, Shuyu"]},{"key":"dc:creator","label":"Author","values":["Sade, Fatma Betul"]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"dc:date.accessioned","label":"Dc Date Accessioned","values":["2019-11-25T19:52:07Z"]},{"key":"dc:date.available","label":"Dc Date Available","values":["2021-08-01T07:32:05Z"]},{"key":"dc:date.issued","label":"Date","values":["2019-05-15"]},{"key":"dc:type","label":"Dc Type","values":["Thesis"]},{"key":"thesis:degree_discipline","label":"Discipline","values":["Plant Breeding"]},{"key":"thesis:degree_level","label":"Degree Level","values":["Masters"]},{"key":"thesis:degree_name","label":"Degree Name","values":["Master of Science"]},{"key":"thesis:institution_name","label":"Thesis Institution Name","values":["Texas A&M University"]}]},{"id":"subjects_keywords","label":"Subjects and Keywords","entries":[{"key":"dc:subject","label":"Dc Subject","values":["Hybrid wheat","Wheat Floral Traits"]}]},{"id":"language_rights","label":"Language and Rights","entries":[{"key":"dc:language.iso","label":"Language (ISO)","values":["en"]}]},{"id":"identifiers","label":"Identifiers","entries":[{"key":"dc:identifier.uri","label":"Identifier URI","values":["https://hdl.handle.net/1969.1/186309"]}]},{"id":"additional","label":"Additional Metadata","entries":[{"key":"dc:description.abstract","label":"Abstract","values":["The demand for agricultural and natural recourses is rising due to population growth. Hybrid technology is an effective way to increase yield potential and production of wheat (Triticum aestivum L.) to meet the demand of 9.7 billion people in 2050. Self-pollinated crops are challenging due to high seed production cost and the need to force them to behave as a cross-pollinated crop. Therefore, a compromise between heterosis and floral suitability often needs to be reached in hybrid wheat production. Recently, the interest in hybrid wheat has been renewed because of higher wheat prices, climate change, new technological developments in next-generation sequencing, and capability of predicting heterosis at the molecular level. In addition, the performance potential of hybrids increased due to more focused studies on wheat flower biology. It is apparent that the redesign of floral characteristics is a prerequisite for hybrid wheat breeding to achieve high outcrossing ability. Therefore, the purpose of this research was to 1) screen the Uniform Variety Trial (UVT) and Texas Elite (TXE) lines for desirable floral characteristics, and 2) characterize the best male and female candidates for inclusion in the Texas A&M AgriLife hybrid wheat crossing blocks. The lines were screened for floral characteristics such as days to heading, days to anthesis, anther extrusion, anther score, stigma exsertion, gape, and plant height in College Station and McGregor, TX for two years. The results of combined environment analyses indicated that genotypic variances were significantly different for all floral characteristics. Non-gender and male traits had high heritability estimates. The heritability of anther extrusion ranged from 0.82 to 0.87. The non-gender and male traits exhibited highly reliable genotypic coefficient of variance (GCV), while female traits had low GCV levels. The correlation between days to heading and anthesis; anther score and anther extrusion; as well as stigma exsertion and gape were positive and significant. The lines were screened for Rht-B1 and Rht-D1 height reduction genes. Five of the UVT lines had Rht-B1a/ Rht-D1b and only one of the TXE lines had it. The rest of the lines had Rht-B1b/ Rht-D1a genes."]},{"key":"dc:format.mimetype","label":"Dc Format Mimetype","values":["application/pdf"]},{"key":"dc:title","label":"Title","values":["Genotype-by-Floral Characteristics Interaction for Hybrid Wheat (Triticum aestivum L.) Production in Texas"]}]}],"canonical_facts":{"dc:contributor.advisor":["Ibrahim, Amir M.H."],"dc:contributor.committeemember":["Rudd, Jackie C.","Liu, Shuyu"],"dc:creator":["Sade, Fatma Betul"],"dc:date.accessioned":["2019-11-25T19:52:07Z"],"dc:date.available":["2021-08-01T07:32:05Z"],"dc:date.issued":["2019-05-15"],"dc:description.abstract":["The demand for agricultural and natural recourses is rising due to population growth. Hybrid technology is an effective way to increase yield potential and production of wheat (Triticum aestivum L.) to meet the demand of 9.7 billion people in 2050. Self-pollinated crops are challenging due to high seed production cost and the need to force them to behave as a cross-pollinated crop. Therefore, a compromise between heterosis and floral suitability often needs to be reached in hybrid wheat production. Recently, the interest in hybrid wheat has been renewed because of higher wheat prices, climate change, new technological developments in next-generation sequencing, and capability of predicting heterosis at the molecular level. In addition, the performance potential of hybrids increased due to more focused studies on wheat flower biology. It is apparent that the redesign of floral characteristics is a prerequisite for hybrid wheat breeding to achieve high outcrossing ability. Therefore, the purpose of this research was to 1) screen the Uniform Variety Trial (UVT) and Texas Elite (TXE) lines for desirable floral characteristics, and 2) characterize the best male and female candidates for inclusion in the Texas A&M AgriLife hybrid wheat crossing blocks. The lines were screened for floral characteristics such as days to heading, days to anthesis, anther extrusion, anther score, stigma exsertion, gape, and plant height in College Station and McGregor, TX for two years. The results of combined environment analyses indicated that genotypic variances were significantly different for all floral characteristics. Non-gender and male traits had high heritability estimates. The heritability of anther extrusion ranged from 0.82 to 0.87. The non-gender and male traits exhibited highly reliable genotypic coefficient of variance (GCV), while female traits had low GCV levels. The correlation between days to heading and anthesis; anther score and anther extrusion; as well as stigma exsertion and gape were positive and significant. The lines were screened for Rht-B1 and Rht-D1 height reduction genes. Five of the UVT lines had Rht-B1a/ Rht-D1b and only one of the TXE lines had it. The rest of the lines had Rht-B1b/ Rht-D1a genes."],"dc:format.mimetype":["application/pdf"],"dc:identifier.uri":["https://hdl.handle.net/1969.1/186309"],"dc:language.iso":["en"],"dc:subject":["Hybrid wheat","Wheat Floral Traits"],"dc:title":["Genotype-by-Floral Characteristics Interaction for Hybrid Wheat (Triticum aestivum L.) Production in Texas"],"dc:type":["Thesis"],"thesis:degree_discipline":["Plant Breeding"],"thesis:degree_level":["Masters"],"thesis:degree_name":["Master of Science"],"thesis:institution_name":["Texas A&M University"]},"updated_at":"2026-08-21T16:48:40Z"}