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Volatile Composition, Sensory Attributes and Quantitative Trait Loci (QTLs) Associated With Flavor Traits in Cooked Sweetpotato (Ipomoea batatas)
Volatile Composition, Sensory Attributes and Quantitative Trait Loci (QTLs) Associated With Flavor Traits in Cooked Sweetpotato (Ipomoea batatas)
Detailed Information
- 자료유형
- 학위논문 서양
- 최종처리일시
- 20260202105631
- ISBN
- 9798297633681
- DDC
- 664.12
- 서명/저자
- Volatile Composition, Sensory Attributes and Quantitative Trait Loci (QTLs) Associated With Flavor Traits in Cooked Sweetpotato (Ipomoea batatas)
- 발행사항
- [Sl] : North Carolina State University, 2025
- 발행사항
- Ann Arbor : ProQuest Dissertations & Theses, 2025
- 형태사항
- 212 p
- 주기사항
- Source: Dissertations Abstracts International, Volume: 87-04, Section: B.
- 주기사항
- Advisor: Yencho, G. Craig;Iorizzo, Massimo.
- 학위논문주기
- Thesis (Ph.D.)--North Carolina State University, 2025.
- 초록/해제
- 요약Consumers have identified flavor as one of the major traits that drive the consumption and liking of cooked sweetpotato. Knowledge of the key flavor-related volatile organic compounds (VOCs) are also highly valuable for breeders as they seek to develop new varieties for various industry segments. However, the lack of phenotypic data and modern breeding tools limits the selection of consumer preferred varieties and development of new flavor types for different markets. To bridge this gap, we carried out three studies focused on: 1) understanding the nature of VOCs in cooked sweetpotato; 2) identifying the key compounds that drive unique flavor attributes; and 3) exploring the genetics of these important VOCs.In Chapter one, we review the sweetpotato VOCs identified in the literature and summarize how these VOCs influence sensory perception and consumer preferences. Over 400 VOCs have been identified in cooked sweetpotato with over 76 known to be aroma active. Suggested mechanisms of formation of these active aroma VOCs are described. However, specific compounds that drive flavor in cooked sweetpotato are yet to be fully characterized. To aid the characterization of these VOCs, Chapter two focused on identifying key predictors of sweetpotato flavor through modelling the compounds identified in a biparental sweetpotato genetic mapping population (n = 416) with the flavor attributes identified in a subset of the population (n = 42) using Partial Least Square regression (PLS). 1284 VOCs differentiated the 416 genotypes, among which 240 were annotated in mass spectra matching. Additionally, the 42 genotypes were differentiated by 12 flavor attributes and 297 VOCs, including 158 not previously reported in sweetpotato. "Sweetpotato", "caramel/sweet aromatics", "cooked carrot", "pumpkin/squash", and "floral" were dominant distinguishing flavors, positively associated with benzyl mandelate, 2-furanmethanol, D-limonene, (-)-cis-myrtanol, and δ -3-carene respectively. Significant but less distinguishing flavors were "baked potato", "roasted chestnut", "earthy", "cooked green", and "sharp/sour aromatics", which were positively associated with 2(5H)- furanone, (Z)-4-hexen-1-ol, 2 unidentified VOCs, nerol oxide, (-)-myrtenol, and phenylethyl alcohol. The knowledge obtained from the VOCs, and sensory and prediction analyses form a basis for targeted flavor improvement by breeding.Understanding the genetic basis and identification of major or minor quantitative trait loci (QTLs) underlying the flavor traits may enable marker-assisted selection strategies in sweetpotato breeding programs. In Chapter three, we explored the genetic basis of the important flavor traits identified in the previous study, using a QTL analysis of 178 VOCs. 88 major-effect QTLs associated with 65 VOCs were detected in one growing season. Among them, 31 QTLs were identified for sesquiterpenes, while 15 and 4 QTLs were identified for monoterpenes, and carotenoid derived VOCs respectively. No QTLs were identified for the Maillard Reaction (MR) compounds which are known to predict "sweetpotato" and "caramel" flavor, suggesting that their formation is not genetically controlled. However, significant QTLs were detected for monoterpenes and apocarotenoids that positively predict "cooked carrot" flavor. This research will provide valuable insights on the components of sweetpotato flavor to guide breeders in developing new varieties that will ultimately enhance consumer experience.Finally, in Chapter four, we present a narrative review paper on the impact of international aid investment in plant breeding research in Sub-Saharan Africa (SSA), using root and tuber crops (Cassava, Sweetpotato, Yams, Plantains/Bananas and Potato) as a case study. Our review shows that investment in plant breeding research has significantly improved technology transfer, and availability of new tools for development of new/improved varieties. However, translating these tools to the development of improved varieties and uptake by farmers has not been completely successful. This is due, in part, to our lack of knowledge and ability to breed for texture and flavor traits that consumers prefer. In summary, advancing plant breeding research for development in SSA requires time, autonomy, an appreciation of agronomic and regional flavor characteristics and a more decentralized funding structure for local needs to be met.
- 일반주제명
- Sucrose
- 일반주제명
- Food science
- 일반주제명
- Cooking
- 일반주제명
- Carbohydrates
- 일반주제명
- Chemistry
- 일반주제명
- Amino acids
- 일반주제명
- Crops
- 일반주제명
- Scientific imaging
- 일반주제명
- Chromatography
- 일반주제명
- Lipids
- 일반주제명
- Horticulture
- 일반주제명
- Mass spectrometry
- 일반주제명
- Aldehydes
- 일반주제명
- Agricultural research
- 일반주제명
- Sensory perception
- 일반주제명
- Dehydration
- 일반주제명
- Glucose
- 일반주제명
- Carotenoids
- 일반주제명
- Correlation analysis
- 일반주제명
- Flavors
- 일반주제명
- Metabolites
- 키워드
- Sweetpotato
- 기본자료저록
- Dissertations Abstracts International. 87-04B.
- 전자적 위치 및 접속
- 로그인 후 원문을 볼 수 있습니다.
MARC
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■020 ▼a9798297633681
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■040 ▼aMiAaPQ▼cMiAaPQ
■0820 ▼a664.12
■1001 ▼aAbugu, Modesta Nnedinso.
■24510▼aVolatile Composition, Sensory Attributes and Quantitative Trait Loci (QTLs) Associated With Flavor Traits in Cooked Sweetpotato (Ipomoea batatas)
■260 ▼a[Sl]▼bNorth Carolina State University▼c2025
■260 1▼aAnn Arbor▼bProQuest Dissertations & Theses▼c2025
■300 ▼a212 p
■500 ▼aSource: Dissertations Abstracts International, Volume: 87-04, Section: B.
■500 ▼aAdvisor: Yencho, G. Craig;Iorizzo, Massimo.
■5021 ▼aThesis (Ph.D.)--North Carolina State University, 2025.
■520 ▼aConsumers have identified flavor as one of the major traits that drive the consumption and liking of cooked sweetpotato. Knowledge of the key flavor-related volatile organic compounds (VOCs) are also highly valuable for breeders as they seek to develop new varieties for various industry segments. However, the lack of phenotypic data and modern breeding tools limits the selection of consumer preferred varieties and development of new flavor types for different markets. To bridge this gap, we carried out three studies focused on: 1) understanding the nature of VOCs in cooked sweetpotato; 2) identifying the key compounds that drive unique flavor attributes; and 3) exploring the genetics of these important VOCs.In Chapter one, we review the sweetpotato VOCs identified in the literature and summarize how these VOCs influence sensory perception and consumer preferences. Over 400 VOCs have been identified in cooked sweetpotato with over 76 known to be aroma active. Suggested mechanisms of formation of these active aroma VOCs are described. However, specific compounds that drive flavor in cooked sweetpotato are yet to be fully characterized. To aid the characterization of these VOCs, Chapter two focused on identifying key predictors of sweetpotato flavor through modelling the compounds identified in a biparental sweetpotato genetic mapping population (n = 416) with the flavor attributes identified in a subset of the population (n = 42) using Partial Least Square regression (PLS). 1284 VOCs differentiated the 416 genotypes, among which 240 were annotated in mass spectra matching. Additionally, the 42 genotypes were differentiated by 12 flavor attributes and 297 VOCs, including 158 not previously reported in sweetpotato. "Sweetpotato", "caramel/sweet aromatics", "cooked carrot", "pumpkin/squash", and "floral" were dominant distinguishing flavors, positively associated with benzyl mandelate, 2-furanmethanol, D-limonene, (-)-cis-myrtanol, and δ -3-carene respectively. Significant but less distinguishing flavors were "baked potato", "roasted chestnut", "earthy", "cooked green", and "sharp/sour aromatics", which were positively associated with 2(5H)- furanone, (Z)-4-hexen-1-ol, 2 unidentified VOCs, nerol oxide, (-)-myrtenol, and phenylethyl alcohol. The knowledge obtained from the VOCs, and sensory and prediction analyses form a basis for targeted flavor improvement by breeding.Understanding the genetic basis and identification of major or minor quantitative trait loci (QTLs) underlying the flavor traits may enable marker-assisted selection strategies in sweetpotato breeding programs. In Chapter three, we explored the genetic basis of the important flavor traits identified in the previous study, using a QTL analysis of 178 VOCs. 88 major-effect QTLs associated with 65 VOCs were detected in one growing season. Among them, 31 QTLs were identified for sesquiterpenes, while 15 and 4 QTLs were identified for monoterpenes, and carotenoid derived VOCs respectively. No QTLs were identified for the Maillard Reaction (MR) compounds which are known to predict "sweetpotato" and "caramel" flavor, suggesting that their formation is not genetically controlled. However, significant QTLs were detected for monoterpenes and apocarotenoids that positively predict "cooked carrot" flavor. This research will provide valuable insights on the components of sweetpotato flavor to guide breeders in developing new varieties that will ultimately enhance consumer experience.Finally, in Chapter four, we present a narrative review paper on the impact of international aid investment in plant breeding research in Sub-Saharan Africa (SSA), using root and tuber crops (Cassava, Sweetpotato, Yams, Plantains/Bananas and Potato) as a case study. Our review shows that investment in plant breeding research has significantly improved technology transfer, and availability of new tools for development of new/improved varieties. However, translating these tools to the development of improved varieties and uptake by farmers has not been completely successful. This is due, in part, to our lack of knowledge and ability to breed for texture and flavor traits that consumers prefer. In summary, advancing plant breeding research for development in SSA requires time, autonomy, an appreciation of agronomic and regional flavor characteristics and a more decentralized funding structure for local needs to be met.
■590 ▼aSchool code: 0155.
■650 4▼aSucrose
■650 4▼aVolatile organic compounds--VOCs
■650 4▼aFood science
■650 4▼aCooking
■650 4▼aCarbohydrates
■650 4▼aChemistry
■650 4▼aAmino acids
■650 4▼aCrops
■650 4▼aScientific imaging
■650 4▼aChromatography
■650 4▼aLipids
■650 4▼aHorticulture
■650 4▼aMass spectrometry
■650 4▼aAldehydes
■650 4▼aAgricultural research
■650 4▼aSensory perception
■650 4▼aDehydration
■650 4▼aGlucose
■650 4▼aCarotenoids
■650 4▼aCorrelation analysis
■650 4▼aFlavors
■650 4▼aMetabolites
■653 ▼aSweetpotato
■653 ▼aVolatile organic compounds
■653 ▼aPartial Least Square regression
■690 ▼a0471
■690 ▼a0485
■690 ▼a0359
■71020▼aNorth Carolina State University.
■7730 ▼tDissertations Abstracts International▼g87-04B.
■790 ▼a0155
■791 ▼aPh.D.
■792 ▼a2025
■793 ▼aEnglish
■85640▼uhttp://www.riss.kr/pdu/ddodLink.do?id=T17360874▼nKERIS▼z이 자료의 원문은 한국교육학술정보원에서 제공합니다.
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