Effect of Planting Ratio of Male Sterility (MS) and Restorer Line (RL) on Fatty Acid Content and Composition during Seed Filling Period in F₁ Seed of Brassica napus L.
2010
Ku, Y.G., Chonnam National University, Gwangju, Republic of Korea | Yang, S.Y., Yeong-Gwang Agricultural Technology Center, Yeong-Gwang, Republic of Korea | Jung, Y.S., Yeong-Gwang Agricultural Technology Center, Yeong-Gwang, Republic of Korea | Kim, H.S., Chonnam National University, Gwangju, Republic of Korea | Suh, M.C., Chonnam National University, Gwangju, Republic of Korea | Ahn, S.J., Chonnam National University, Gwangju, Republic of Korea
The objective of this experiment was determined to investigate the effect of the planting ratio of Male Sterility (MS) to Restorer Line (RL) and harvesting time on fatty acid compositions under F₁ seed production of Brassica napus L. For rapeseed seed production, two experiments were conducted in the open fields. One experiment studied planting ratios of MS to RL (4:2, 10:2, or 10:1) were planted and investigated fatty acid composition at 40, 45, 50, 55, and 60 days after flowering, the other F₂ seeds were analyzed on fatty acid compositions of harvested seeds at five sequential stages. The results showed that fatty acid compositions of developing seeds were influenced by MS:RL planting ratios and F₂ hybrid treatments and contaminated level of fatty acid compositions, erucic acid, were unaffected by planting ratio of MS to RL. Fatty acid compositions such as palmitic acid (C16:0), stearic acid (C18:0) and linoleic acid (C18:2) contents decreased during seed maturation period in 1∨st and 2∨nd experiments. In contrast, oleic acid (C18:1) content relatively increased up to 55days after flowering. At day 60 after flowering, oleic acid content was unaffected by MS:RL planting ratios and seeds treatments. Aspects of related gene expression of fatty acid synthesis such as SAD, FAD1 and FAD2 were followed exactly to changes of fatty acid composition during seed maturation. These results suggest that MS ratio may be enlarged and RL may be reduced, indicating this ratio will be useful for rape seed production.
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