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Northern Leaf Blight Resistance in Maize: Benefits, Costs, and High-Throughput Phenotyping- [electronic resource]
Northern Leaf Blight Resistance in Maize: Benefits, Costs, and High-Throughput Phenotyping...
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Northern Leaf Blight Resistance in Maize: Benefits, Costs, and High-Throughput Phenotyping- [electronic resource]
자료유형  
 학위논문파일 국외
최종처리일시  
20240214101636
ISBN  
9798380316323
DDC  
630
저자명  
Moreta Mejia, Danilo Eduardo.
서명/저자  
Northern Leaf Blight Resistance in Maize: Benefits, Costs, and High-Throughput Phenotyping - [electronic resource]
발행사항  
[S.l.]: : Cornell University., 2023
발행사항  
Ann Arbor : : ProQuest Dissertations & Theses,, 2023
형태사항  
1 online resource(170 p.)
주기사항  
Source: Dissertations Abstracts International, Volume: 85-03, Section: B.
주기사항  
Advisor: Nelson, Rebecca.
학위논문주기  
Thesis (Ph.D.)--Cornell University, 2023.
사용제한주기  
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초록/해제  
요약Resistance breeding is an effective and sustainable disease management strategy, but sometimes can be associated with yield costs and other trade-offs. I measured the effects (direction and magnitude) of northern leaf blight (NLB) resistance in maize at the locus level using near isogenic lines (NILs), and at the population level using a population of diverse hybrids. I also conducted a genome-wide association study (GWAS) for NLB resistance and other traits on the diverse hybrid population and used drone-based high-throughput phenotyping for resistance and yield. I found that locus-driven NLB resistance may have yield penalties in the homozygous state and that is traded-off with northern leaf spot (NLS) susceptibility. I also identified two multiple disease resistant (MDR) NILs for NLB, anthracnose top dieback (ATD), and anthracnose stalk rot (ASR). At the population level, NLB resistance was not associated with yield penalties in the absence of disease. Significant GWAS hits were found for root lodging, stalk lodging, and grain moisture under NLB pressure, but not for NLB. The drone-derived vegetation indices that I extracted from field plots can be used potentially as surrogates or indirect selection criteria for resistance and yield. However, this high-throughput phenotyping technology needs improvement under realistic and typical field conditions of breeding trials. This research has implications for the optimization of maize breeding programs.
일반주제명  
Agriculture.
일반주제명  
Genetics.
일반주제명  
Plant pathology.
키워드  
Drone
키워드  
Hybrids
키워드  
Trade-offs
키워드  
Disease management
키워드  
Multiple disease resistant
기타저자  
Cornell University Plant Breeding
기본자료저록  
Dissertations Abstracts International. 85-03B.
기본자료저록  
Dissertation Abstract International
전자적 위치 및 접속  
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