Search

[Objective] The single cross of maize sister lines can increase its seed production. Because of seed production is the result of multiple agronomic traits of the parents, it is important to reveal the relative importance of each trait to yield for the selection of suitable sister lines. [Method] The relationship among 15 main agronomic traits and yields of the maize inbred line ZOL-1 sister lines was analyzed by grey correlation analysis, correlation analysis and path analysis. [Result ] Grey correlation analysis showed that the order of the influence of 15 traits on yield was rows per ear > ear diameter > kernels per row > plant height > ear length > ear height > days from emergence to silk > three leaves area near ear > bare top length = leaves per plant> days from emergence to pollen > 100-kernel weight> shelling percentage > green leaves at harvest> days from emergence to tassel. Correlation analysis showed that the traits that were significantly positively correlated with yield were kernels per row, ear length, plant height, ear diameter, rows per ear, and three leaves area near ear, the traits showing a significant positive correlation were ear height and 100-kernel weight. Path analysis showed that the direct effect of each trait on yield was kernels per row > rows per ear > 100-kernel weight > plant height > ear diameter > three leaves area near ear > days from emergence to tassel > ear length > leaves per plant > days from emergence to pollen > shelling percentage > days from emergence to silk > bare top length > ear height > green leaves at harvest. [Conclusion] Plant height, ear diameter, ear row number, and kernels per row were the main factors affecting the yield of the sister lines of the maize inbred line ZOL-1, which could be used as reference indicators for the selection of maize sister lines and hybrid hybrids. [ABSTRACT FROM AUTHOR]

[Objective]The study on the correlation between main agronomic characters and yield of Brassica juncea in Guizhou will provide theoretical guidance for breeding research. [Method] Through correlation and path analysis, the relationship between main agronomic characters and yield of 269 local B. juncea in Guizhou was studied. [Result] The number of effective pod per plant, the number of secondary effective branches, the number of pod per main inflorescence, plant height, the number of primary effective branches and the number of seeds per pod were significantly positively correlated with the yield, and the 1000-grain weight was significantly correlated with the yield. The direct path coefficient indicated the effect degree of different agronomic traits on the yield of B. juncea, which showed that whole plant effective pod number (x8) > 1000-grain weight (xlO) > plant height (xl) >secondary effective branch number (x5) > main inflorescence pod number (x7) > per pod number (x9) > branch angle (x6) > effective branch height (x2) > primary effective branch number (x4) > main inflorescence long (x3). [Conclusion] The number of effective pod per plant, secondary effective branches, pod per main inflorescence, the plant height, the number of primary effective branches and 1000-grain weight were the main factors affecting the yield. The secondary effective branch number had a great contribution to the whole plant pod number, and had a great positive effect through the whole plant pod number. Therefore, the selection of pod number and secondary effective branch number should be emphasized in high yield breeding of B. juncea. [ABSTRACT FROM AUTHOR]