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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 Wit...
Volatile Composition, Sensory Attributes and Quantitative Trait Loci (QTLs) Associated With Flavor Traits in Cooked Sweetpotato (Ipomoea batatas)

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자료유형  
 학위논문 서양
최종처리일시  
20260202105631
ISBN  
9798297633681
DDC  
664.12
저자명  
Abugu, Modesta Nnedinso.
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  
Volatile organic compounds--VOCs
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
키워드  
Volatile organic compounds
키워드  
Partial Least Square regression
기타저자  
North Carolina State University.
기본자료저록  
Dissertations Abstracts International. 87-04B.
전자적 위치 및 접속  
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MARC

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■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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