351. Performance of Yield Components and Morphological Traits and Their Relationships of the Lint Yield in Bt Cotton (Gossypium hirsutum) Hybrids.
- Author
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Tang Feiyu, Fu Xueqin, Mo Wangcheng, Wang Xiaofang, and Xiao Wenjun
- Subjects
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COTTON quality , *CROP yields , *TRANSGENIC plants , *PLANT morphology , *LINEAR free energy relationship , *REGRESSION analysis - Abstract
A field experiment was conducted with the objective to compare the mean performance of yield components and morphological traits among Bt cotton hybrids with diverse yield level, and to evaluate their relationships of the lint yield. Thirty insect-resistant transgenic upland cotton crosses were divided into three types (high, medium, low) based on lint yield per hectare by squared Euclidean distance and Ward linkage. Three yield components and 10 morphological traits of the three types were separated using ANOVA procedure and the Duncan's multiple range test. The relationships between them and lint yield were investigated using correlation analysis and stepwise regression analysis. The results showed there was statistically significant difference in bolls per plant and lint percentage for the three types, which increased with increasing lint yield. The Pearson's correlation coefficients between them and lint yield were the highest. The direct path coefficient was the maximum for bolls per plant to lint yield. No statistically significant difference was found for the ten morphological traits in the three types. The direct path coefficient of fruiting sites per sympodia to lint yield was positive and significant at 0.05 level. The minimum direct path coefficient to lint yield was due to height of the first fruiting branch [ABSTRACT FROM AUTHOR]
- Published
- 2012