Mississippi State University
Reddy, Kambam Raja
Baldwin, Brian S.
Melanson, Rebecca A.
Date of Degree
Graduate Thesis - Open Access
Master of Science
College of Agriculture and Life Sciences
Temperature is a major abiotic stress limiting plant growth. Thermotolerance evaluation during germination and early growth may help identify adaptable genotypes of new crops. Two studies were conducted to evaluate temperature effects on 12 Brassica carinata genotypes during germination and early growth. During germination, genotype AX17004 was both the most cold- and heat-tolerant. During early-season growth (35 d after seeding), there were temperature and genotype effects on shoot, root, and physiological components. Cumulative low- and high-temperature response indices, and cumulative root and shoot response indices were related, indicating the importance of these traits. Genotype AX17006 was identified as heat tolerant, and AX17009 as cold tolerant during early-season growth. When genotypes were grouped according to breed types, hybrids generally had better responses than the inbred lines, and double haploids and the check responses were intermediate. These studies provided rapid results that will reduce the number of genotypes assessed in field studies.
USDA National Institute of Food and Agriculture-Agriculture and Food Research Initiative Competitive Grant, through the Southeast Partnership for Advanced Renewables from Carinata (SPARC) project: Project no. USDA-NIFA 2016-11231
Persaud, Leelawattie, "Thermotolerance classification of Brassica carinata genotypes using germination assay and vegetative growth parameters" (2020). Theses and Dissertations. 4719.