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Development of Genetic Resources and Tools for Characterizing and Improving the Traits of Seed Oil and Protein Contents in Soybean
Development of Genetic Resources and Tools for Characterizing and Improving the Traits of Seed Oil and Protein Contents in Soybean
상세정보
- 자료유형
- 학위논문 서양
- 최종처리일시
- 20260202103825
- ISBN
- 9798314889671
- DDC
- 575
- 서명/저자
- Development of Genetic Resources and Tools for Characterizing and Improving the Traits of Seed Oil and Protein Contents in Soybean
- 발행사항
- [Sl] : The Ohio State University, 2024
- 발행사항
- Ann Arbor : ProQuest Dissertations & Theses, 2024
- 형태사항
- 161 p
- 주기사항
- Source: Dissertations Abstracts International, Volume: 86-11, Section: B.
- 주기사항
- Advisor: McHale, Leah A.
- 학위논문주기
- Thesis (Ph.D.)--The Ohio State University, 2024.
- 초록/해제
- 요약Soybean, a vital oilseed crop and protein meal source, plays an important role in the global economy and food supply. It serves as a major source of vegetable oil and primary protein for swine and poultry feed due to its unique seed compositions. However, challenges arise from the negative correlation between oil and protein contents, and between yield and protein content, posing challenges to developing cultivars with high yield, high oil, and high protein contents. Despite extensive studies on the biochemistries of these traits, the complexities persist, driving the need for advancements in breeding and biotechnology. Efforts and progress in using genetics and biotechnology to understand and modulate soybean traits were reviewed in Chapter 1. To contribute to such collective efforts, in my study, I utilized breeding and biotechnology techniques to develop genetic resources and tools for characterizing and improving the traits of seed oil and protein contents. In Chapter 2, I examined singleand multiple-trait methods for quantitative trait locus (QTL) analyses using recombinant inbred populations with elite backgrounds. The project revealed that single-trait QTL analysis was sufficient for high-heritability traits like seed oil and protein contents and provided QTLs for marker-assisted selection and possibilities to determine their allelic effects on yield, thanks to the elite pedigree. Candidate genes were identified from the QTLs for functional analysis. The lack of tools for efficient gene characterization in soybean seed traits was addressed in Chapter 3 through a proposed CRISPR/Cas9-mediated gene silencing method via particle bombardment of embryogenic tissues. The approach holds the potential for rapid gene functional characterization by bypassing the need for full plant regeneration. Though the project yielded negative results, most likely due to low transformation frequency in soybean, more optimizations could be tested to improve the tool. Continuing to exploit the benefits of genetic engineering in soybean research, in Chapter 4, I examined Agrobacterium-transformed soybean lines that would potentially display enhanced seed oil content by expressing the Arabidopsis thaliana transcription factor WRINKLED1 and gene diacylglycerol O-acyltransferase 1 that control seed lipid synthesis during embryo development. Specifically, their transcriptomic profiles were analyzed, indicating successful transgene expression and upregulation of oil production-related genes under the influence of WRINKLED1. The use of transgenic lines was further applied in Chapter 5 to characterize seven candidate genes of meta-QTLs associated with seed oil and protein contents. These genes were overexpressed or knocked down, and resulting changes in their seed compositions were observed. Transgenic lines were successfully established for each target gene and being characterized. Preliminary data showed that some lines exhibited unexpected transgenic phenotypes of oil and protein contents, underscoring the intricacies of seed composition biochemistry. The study in Chapter 5 led to a tool development in Chapter 6 for transgenic line screenings: I established and optimized the application of a duplex droplet digital PCR using a single dye for cost-efficient determination of transgene copy number and homozygosity. The method proved effective in distinguishing single-copy events from those with multiple transgene insertions. In brief, soybean's pivotal role in the global economy and food supply necessitates constant innovation. This dissertation contributed to advances in breeding, genetics, and biotechnology, providing promising avenues for addressing the complexities of seed oil and protein traits, ensuring the continued improvement of commercial varieties to enhance values for soybean growers and meet evolving market demands.
- 일반주제명
- Genetics
- 일반주제명
- Agriculture
- 일반주제명
- Plant sciences
- 키워드
- Soybean breeding
- 키워드
- Seed oil
- 키워드
- Seed protein
- 기타저자
- The Ohio State University Horticulture and Crop Science
- 기본자료저록
- Dissertations Abstracts International. 86-11B.
- 전자적 위치 및 접속
- 로그인 후 원문을 볼 수 있습니다.
MARC
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■24510▼aDevelopment of Genetic Resources and Tools for Characterizing and Improving the Traits of Seed Oil and Protein Contents in Soybean
■260 ▼a[Sl]▼bThe Ohio State University▼c2024
■260 1▼aAnn Arbor▼bProQuest Dissertations & Theses▼c2024
■300 ▼a161 p
■500 ▼aSource: Dissertations Abstracts International, Volume: 86-11, Section: B.
■500 ▼aAdvisor: McHale, Leah A.
■5021 ▼aThesis (Ph.D.)--The Ohio State University, 2024.
■520 ▼aSoybean, a vital oilseed crop and protein meal source, plays an important role in the global economy and food supply. It serves as a major source of vegetable oil and primary protein for swine and poultry feed due to its unique seed compositions. However, challenges arise from the negative correlation between oil and protein contents, and between yield and protein content, posing challenges to developing cultivars with high yield, high oil, and high protein contents. Despite extensive studies on the biochemistries of these traits, the complexities persist, driving the need for advancements in breeding and biotechnology. Efforts and progress in using genetics and biotechnology to understand and modulate soybean traits were reviewed in Chapter 1. To contribute to such collective efforts, in my study, I utilized breeding and biotechnology techniques to develop genetic resources and tools for characterizing and improving the traits of seed oil and protein contents. In Chapter 2, I examined singleand multiple-trait methods for quantitative trait locus (QTL) analyses using recombinant inbred populations with elite backgrounds. The project revealed that single-trait QTL analysis was sufficient for high-heritability traits like seed oil and protein contents and provided QTLs for marker-assisted selection and possibilities to determine their allelic effects on yield, thanks to the elite pedigree. Candidate genes were identified from the QTLs for functional analysis. The lack of tools for efficient gene characterization in soybean seed traits was addressed in Chapter 3 through a proposed CRISPR/Cas9-mediated gene silencing method via particle bombardment of embryogenic tissues. The approach holds the potential for rapid gene functional characterization by bypassing the need for full plant regeneration. Though the project yielded negative results, most likely due to low transformation frequency in soybean, more optimizations could be tested to improve the tool. Continuing to exploit the benefits of genetic engineering in soybean research, in Chapter 4, I examined Agrobacterium-transformed soybean lines that would potentially display enhanced seed oil content by expressing the Arabidopsis thaliana transcription factor WRINKLED1 and gene diacylglycerol O-acyltransferase 1 that control seed lipid synthesis during embryo development. Specifically, their transcriptomic profiles were analyzed, indicating successful transgene expression and upregulation of oil production-related genes under the influence of WRINKLED1. The use of transgenic lines was further applied in Chapter 5 to characterize seven candidate genes of meta-QTLs associated with seed oil and protein contents. These genes were overexpressed or knocked down, and resulting changes in their seed compositions were observed. Transgenic lines were successfully established for each target gene and being characterized. Preliminary data showed that some lines exhibited unexpected transgenic phenotypes of oil and protein contents, underscoring the intricacies of seed composition biochemistry. The study in Chapter 5 led to a tool development in Chapter 6 for transgenic line screenings: I established and optimized the application of a duplex droplet digital PCR using a single dye for cost-efficient determination of transgene copy number and homozygosity. The method proved effective in distinguishing single-copy events from those with multiple transgene insertions. In brief, soybean's pivotal role in the global economy and food supply necessitates constant innovation. This dissertation contributed to advances in breeding, genetics, and biotechnology, providing promising avenues for addressing the complexities of seed oil and protein traits, ensuring the continued improvement of commercial varieties to enhance values for soybean growers and meet evolving market demands.
■590 ▼aSchool code: 0168.
■650 4▼aGenetics
■650 4▼aAgriculture
■650 4▼aPlant sciences
■653 ▼aSoybean breeding
■653 ▼aSoybean biotechnology
■653 ▼aSeed oil
■653 ▼aSeed protein
■690 ▼a0479
■690 ▼a0473
■690 ▼a0369
■71020▼aThe Ohio State University▼bHorticulture and Crop Science.
■7730 ▼tDissertations Abstracts International▼g86-11B.
■790 ▼a0168
■791 ▼aPh.D.
■792 ▼a2024
■793 ▼aEnglish
■85640▼uhttp://www.riss.kr/pdu/ddodLink.do?id=T17358278▼nKERIS▼z이 자료의 원문은 한국교육학술정보원에서 제공합니다.


