ÃÞ »¨ ѧ ±¨ Cotton Science 2010£¬22£¨3£©£º267~272
Analysis on the Relationship between Heterosis of Quality Traits Fiber Colors Abstract£ºSeven kinds of hybrid combinations were made based on four kinds of color fiber lines including white, green, brown, dark brown. The differences of fiber color and the fiber quality traits, the correlation between fiber color and the heterosis of the fiber quality traits were analyzed. The results showed that: the average super-parent heterosis between the cross of the dark brown and green line was strongest. The average mid-parent heterosis in the combinations between the white and dark brown, dark brown and green lines were better. The correlation coefficients between super-parent heterosis and their parents in absolute value of fiber length, strength, micronaire traits were very significantly different. But the correlation between mid-parent heterosis and their parents were not different in a significant level. The correlation coefficients between the fiber color and fiber length, strength traits, super-parent and mid-parent heterosis were -0.3601 and -0.4487, -0.3978 and -0.3895, respectively, all were very significant. The correlation coefficient of fiber color and the F1 fiber length was -0.6045, significant at 0.01 levels. In breeding, the heterosis can be used to improve fiber length and strength simultaneously. The crosses of dark brown and green, green and green, brown and green combinations can be used for improving fiber quality with dark color fiber. The darker the fiber colors of two parents were, the weaker the super-parent and mid-parent heterosis of fiber length and strength traits were. So it is difficult to improve the fiber quality of color cotton.
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