본문

서브메뉴

Super-Pangenome as the New Reference to Facilitate Watermelon Trait Genetics and Breeding
Super-Pangenome as the New Reference to Facilitate Watermelon Trait Genetics and Breeding
Super-Pangenome as the New Reference to Facilitate Watermelon Trait Genetics and Breeding

Detailed Information

자료유형  
 학위논문 서양
최종처리일시  
20260202105256
ISBN  
9798273309401
DDC  
580
저자명  
Sun, Honghe.
서명/저자  
Super-Pangenome as the New Reference to Facilitate Watermelon Trait Genetics and Breeding
발행사항  
[Sl] : Cornell University, 2025
발행사항  
Ann Arbor : ProQuest Dissertations & Theses, 2025
형태사항  
155 p
주기사항  
Source: Dissertations Abstracts International, Volume: 87-07, Section: B.
주기사항  
Advisor: Fei, Zhangjun.
학위논문주기  
Thesis (Ph.D.)--Cornell University, 2025.
초록/해제  
요약Crop reference genomes have greatly advanced gene mapping and marker-assisted breeding. However, a single reference genome cannot fully capture the genetic diversity within a crop species. Pangenomes-comprehensive catalogs of genetic elements within a species or genus-are transforming crop genomics by enabling the accurate detection of complex yet important genomic variants such as large structural variants (SVs). Watermelon (Citrullus lanatus subsp. vulgaris) is among the most economically and nutritionally important fruit crops worldwide. Despite considerable phenotypic diversification, watermelon has a narrow genetic base due to long-term selection for fruit-quality traits. In contrast, its wild relatives harbor abundant genetic diversity, particularly resistance genes that are often diverged or even absent in cultivated accessions. Therefore, a pangenomic framework is essential to comprehensively explore watermelon genetic diversity and advance molecular breeding.To address this, I first generated reference genomes for three wild species widely used in breeding and re-sequenced representative cultivated and wild accessions to construct a gene-based super-pangenome. This resource revealed extensive gene presence-absence variation, including resistance-related genes enriched in wild relatives, provided strong genomic evidence supporting Kordofan melon as the direct progenitor of dessert watermelon, and yielded insights into the domestication of flesh bitterness, sweetness, and coloration traits. I then expanded the resource by constructing a graph-based pangenome from 135 newly assembled near-gapless genomes spanning all seven extant Citrullus species. This graph pangenome provided a more complete catalog of the Citrullus gene repertoire and enabled accurate genotyping of nearly one million SVs across ~900 cultivated and wild accessions. This comprehensive variation map uncovered SVs under selection during watermelon domestication and improvement, improved trait-mapping resolution, and identified a causal 1,258-bp copy number variant in the ClFCI1 promoter that regulates flesh color intensity in a dosage-dependent manner. Additionally, I demonstrated the utility of the graph-based pangenome for genomic selection, consistently achieving high prediction accuracy for a range of fruit-quality and disease-resistance traits. Overall, this work establishes a population-level super-pangenome for watermelon, demonstrates the value of graph-based pangenomes as next-generation references, and delivers transferable markers and models for precision breeding, offering a blueprint for future crop pangenomics.
일반주제명  
Plant sciences
일반주제명  
Genetics
일반주제명  
Bioinformatics
일반주제명  
Biology
키워드  
Crop breeding
키워드  
Domestication
키워드  
Genomic selection
키워드  
Pangenome
키워드  
Structural variation
키워드  
Watermelon
기타저자  
Cornell University Plant Biology
기본자료저록  
Dissertations Abstracts International. 87-07B.
전자적 위치 및 접속  
로그인 후 원문을 볼 수 있습니다.

MARC

 008260126s2025        us                              c    eng  d
■001000017360048
■00520260202105256
■006m          o    d                
■007cr#unu||||||||
■020    ▼a9798273309401
■035    ▼a(MiAaPQ)AAI32279039
■040    ▼aMiAaPQ▼cMiAaPQ
■0820  ▼a580
■1001  ▼aSun,  Honghe.
■24510▼aSuper-Pangenome  as  the  New  Reference  to  Facilitate  Watermelon  Trait  Genetics  and  Breeding
■260    ▼a[Sl]▼bCornell  University▼c2025
■260  1▼aAnn  Arbor▼bProQuest  Dissertations  &  Theses▼c2025
■300    ▼a155  p
■500    ▼aSource:  Dissertations  Abstracts  International,  Volume:  87-07,  Section:  B.
■500    ▼aAdvisor:  Fei,  Zhangjun.
■5021  ▼aThesis  (Ph.D.)--Cornell  University,  2025.
■520    ▼aCrop  reference  genomes  have  greatly  advanced  gene  mapping  and  marker-assisted  breeding.  However,  a  single  reference  genome  cannot  fully  capture  the  genetic  diversity  within  a  crop  species.  Pangenomes-comprehensive  catalogs  of  genetic  elements  within  a  species  or  genus-are  transforming  crop  genomics  by  enabling  the  accurate  detection  of  complex  yet  important  genomic  variants  such  as  large  structural  variants  (SVs).  Watermelon  (Citrullus  lanatus  subsp.  vulgaris)  is  among  the  most  economically  and  nutritionally  important  fruit  crops  worldwide.  Despite  considerable  phenotypic  diversification,  watermelon  has  a  narrow  genetic  base  due  to  long-term  selection  for  fruit-quality  traits.  In  contrast,  its  wild  relatives  harbor  abundant  genetic  diversity,  particularly  resistance  genes  that  are  often  diverged  or  even  absent  in  cultivated  accessions.  Therefore,  a  pangenomic  framework  is  essential  to  comprehensively  explore  watermelon  genetic  diversity  and  advance  molecular  breeding.To  address  this,  I  first  generated  reference  genomes  for  three  wild  species  widely  used  in  breeding  and  re-sequenced  representative  cultivated  and  wild  accessions  to  construct  a  gene-based  super-pangenome.  This  resource  revealed  extensive  gene  presence-absence  variation,  including  resistance-related  genes  enriched  in  wild  relatives,  provided  strong  genomic  evidence  supporting  Kordofan  melon  as  the  direct  progenitor  of  dessert  watermelon,  and  yielded  insights  into  the  domestication  of  flesh  bitterness,  sweetness,  and  coloration  traits.  I  then  expanded  the  resource  by  constructing  a  graph-based  pangenome  from  135  newly  assembled  near-gapless  genomes  spanning  all  seven  extant  Citrullus  species.  This  graph  pangenome  provided  a  more  complete  catalog  of  the  Citrullus  gene  repertoire  and  enabled  accurate  genotyping  of  nearly  one  million  SVs  across  ~900  cultivated  and  wild  accessions.  This  comprehensive  variation  map  uncovered  SVs  under  selection  during  watermelon  domestication  and  improvement,  improved  trait-mapping  resolution,  and  identified  a  causal  1,258-bp  copy  number  variant  in  the  ClFCI1  promoter  that  regulates  flesh  color  intensity  in  a  dosage-dependent  manner.  Additionally,  I  demonstrated  the  utility  of  the  graph-based  pangenome  for  genomic  selection,  consistently  achieving  high  prediction  accuracy  for  a  range  of  fruit-quality  and  disease-resistance  traits.  Overall,  this  work  establishes  a  population-level  super-pangenome  for  watermelon,  demonstrates  the  value  of  graph-based  pangenomes  as  next-generation  references,  and  delivers  transferable  markers  and  models  for  precision  breeding,  offering  a  blueprint  for  future  crop  pangenomics.
■590    ▼aSchool  code:  0058.
■650  4▼aPlant  sciences
■650  4▼aGenetics
■650  4▼aBioinformatics
■650  4▼aBiology
■653    ▼aCrop  breeding
■653    ▼aDomestication
■653    ▼aGenomic  selection
■653    ▼aPangenome
■653    ▼aStructural  variation
■653    ▼aWatermelon
■690    ▼a0479
■690    ▼a0369
■690    ▼a0715
■690    ▼a0306
■71020▼aCornell  University▼bPlant  Biology.
■7730  ▼tDissertations  Abstracts  International▼g87-07B.
■790    ▼a0058
■791    ▼aPh.D.
■792    ▼a2025
■793    ▼aEnglish
■85640▼uhttp://www.riss.kr/pdu/ddodLink.do?id=T17360048▼nKERIS▼z이  자료의  원문은  한국교육학술정보원에서  제공합니다.

Preview

Export

ChatGPT Discussion

AI Recommended Related Books


    New Books MORE
    Statistics for the past 3 years. Go to brief

    Подробнее информация.

    • Бронирование
    • не существует
    • моя папка
    • Первый запрос зрения
    • Non-Book Loan Application
    • Nighttime Book Loan Application
    материал
    Reg No. Количество платежных Местоположение статус Ленд информации
    TF18774 전자도서 대출가능 My Folder 부재도서신고 비도서대출신청 야간 도서대출신청

    * Бронирование доступны в заимствований книги. Чтобы сделать предварительный заказ, пожалуйста, нажмите кнопку бронирование

    Books borrowed together with this book

    Related Popular Books

    Available after logging in.