Reciprocal Effects and Selection for Altered Fatty Acid Composition of Soybean Oil.

Heritability;Fatty Acids;Soybean;Maternal Effects;Reciprocal Effects

Gilsinger, Jesse John ; Dr. Thomas Carter, Committee Member,Dr. Joseph Burton, Committee Chair,Dr. Cavell Brownie, Committee Member,Dr. Ralph Dewey, Committee Member,Gilsinger, Jesse John ; Dr. Thomas Carter ; Committee Member ; Dr. Joseph Burton ; Committee Chair ; Dr. Cavell Brownie ; Committee Member ; Dr. Ralph Dewey ; Committee Member

University:North Carolina State University

关键词: Heritability;    Fatty Acids;    Soybean;    Maternal Effects;    Reciprocal Effects;   

Others  :  https://repository.lib.ncsu.edu/bitstream/handle/1840.16/3137/etd.pdf?sequence=1&isAllowed=y

美国|英语

来源: null

【 摘 要 】

ABSTRACTGILSINGER, JESSE JOHN. Reciprocal Effects and Selection for Altered Fatty AcidComposition of Soybean Oil. (Under the direction of JOSEPH W. BURTON)This study focused on increased oleic acid content of soybean oil and consisted ofthree objectives: (1) to study maternal effects for fatty acid composition , (2) to studyreciprocal effects for heritability and stability of increased oleic acid content, and (3) toexamine how other traits are affected by selection for increased oleic acid content.Maternal effects were evaluated in 2005, 2006, and 2007 by analyzing reciprocal F1seed resulting from crosses between the mid-oleic line N98-4445A and Dare, Haberlandt,Ogden, Arksoy, Midwest, and Peking. Reciprocal F1 seeds from a cross between theincreased palmitic line N02-4441 and Dare were grown in vitro. The results showed thatmaternal effects for fatty acid composition were significant across a wide range of geneticmaterials and environments. Maternal effects for the F1 seed dissipated while differencesbetween parents were maintained when grown in vitro.Reciprocal effects for heritability and stability were examined in twelve F2 derivedpopulations over two years developed from reciprocal crosses between N98-4445A andArksoy, Dare, Haberlandt, Midwest, Ogden, and Peking. Significant differences inheritability and stability between reciprocal populations were observed, suggesting it may beadvantageous to make reciprocal crosses when developing populations for altered fatty acidselection in soybeans.To investigate selection for increased oleic acid content, two populations consistingof approximately 60 F4:6 lines were generated by crossing N98-4445A with the cultivars Dareand Tracy and planted as replicated trials at two North Carolina locations in 2006. Fattyacid composition, height, lodging, seed size, seed quality, yield, and maturity were measuredfor each plot. Plants were also genotyped with SSR markers. An increase in oleic acid wascorrelated with a decrease in yield and seed quality. Significant marker-trait associations foroleic acid content, seed quality, and yield were observed in both populations. These resultsdemonstrate that these markers could be useful for marker-assisted selection for the mid-oleictrait across populations and could be used to improve seed quality and yield.