Relationship of inheritance of a high palmitic mutation and plant height in sunflower
2010
Demurin, Y., All Russia Research Institute of Oil Crops (VNIIMK), Krasnodar (Russian Federation) | Borisenko, O., All Russia Research Institute of Oil Crops (VNIIMK), Krasnodar (Russian Federation) | Bochkarev, N., All Russia Research Institute of Oil Crops (VNIIMK), Krasnodar (Russian Federation)
Pleiotropic effect of a high palmitic (p) and high oleic (Ol) mutations in sunflower seed oil was investigated in VK580 near-isogenic lines in field conditions. It was found that the p mutation decreased plant height by 41 cm (32%), number of leaves by 4 (14%) and the period of emergence-flowering by 2 days (4%). The Ol mutation significantly increased plant height by 4 cm (3%). In addition, relationship between inheritance of high palmitic mutation and plant height in the case of selfing of F2 plants was observed in the cross VK850 (p) x VK508 (Ol). The correlation coefficient was r = - 0.54 with linear equation y = 154.49 – 1.95x. The average plant height of the high palmitic homozygotes in the segregated F2 population was lower and estimated at 109 cm as compared with 138 cm in the other plants (LSD05 = 3cm). Thus, a negative effect of the high palmitic mutation on plant height was proved beyond doubt. A question remains whether this phenomenon relates to a gene linkage or true pleiotropy.
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