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Adaptation to Mega-environments: Introgression of novel alleles for yield using Canadian x Chinese crosses in Soybean

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Title: Adaptation to Mega-environments: Introgression of novel alleles for yield using Canadian x Chinese crosses in Soybean
Author: Rossi, Maria Eugenia
Department: Department of Plant Agriculture
Program: Plant Agriculture
Advisor: Rajcan, Istvan
Abstract: The main goal of soybean breeding is to increase yield with improved seed quality characters. The objectives of this thesis were: i) to identify yield quantitative trait loci (QTL) across different mega-environments (ME); ii) to evaluate the relationship between yield and yield components and the co-localization of QTL; iii) to analyze environmental factors that affect QTL expression and identify different ME. Two Canadian x Chinese soybean populations were tested across Canada, northern United States and China. Yield QTL were identified at one, two and three hypothetical ME. Most of them were co-localized with agronomic trait QTL. These results give strong evidence that Canada, northern United States and China are different ME. Novel alleles from plant introductions can favorably contribute directly or indirectly to seed yield and the use of QTL would facilitate their introgression into breeding populations in both North America and China.
URI: http://hdl.handle.net/10214/3184
Date: 2011-12
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