中国农业科学Issue(6)：1240-1248,9.DOI:10.3864/j.issn.0578-1752.2015.06.19
大蒜主要农艺性状变异特征及其与产量相关构成分析
Analysis of Relationship Between Variations of Main Agronomic Traits and Yield in Garlic
摘要
Abstract
[Objective]Garlic is a clonal propagation crop. This makes it difficult to breed new garlic varieties by conventional method. Accordingly, the purpose of this study was to analyze the variation of agronomic traits and to explore the traits controlling the yielding of garlic, wishing to provide important information for germplasm evaluation and innovation to select the high yielding garlic varieties.[Method]In this study, 16 agronomic traits of 78 garlic varieties were analyzed.The relationship of main agronomic traits, including garlic-scape, weight of bulbs and number of cloves were studied to identify the primary indexes of garlic-scapeand bulb yield using the methods of correlation analysis, principal component analysis, multiple linear regression analysis and path analysis.[Result]The results showed that variations in main agronomic traits of garlic varieties were abundant and its coefficient of variation was ranging from 11.1% to 64%. Among the main agronomic traits, the garlic-scape had the most variation in related traits, the weight of bulbs and number of cloves had less variation, taking the second place while the ideotype traits had the least variation ratio. The bulb weight was positively correlated with other agronomic traits significently, in which clove-width was not included. A significant positive correlation was clearly established between other agronomic traits, except leaf-angle and clove-number. Principal component analysis showed that plant type factors, garlic-scape factors, leaf and clove factors were largely responsible for the yield of garlic-bulb and garlic-scape . Regression models, which successfully forecasted the relationships not only between agronomic traits but also between garlic yield bulb and scape were established by stepwise regression analysis. Statistical test was performed and the results showed that the correlation coefficient was significant, the coefficients of garlic bulb and scape were 0.8516 and 0.9449, respectively. Furthermore , path analysis indicated that the main factors that influenced bulb yield were cross diameter of bulb (0.5353), clove length (0.1652), number of cloves (0.147), diameter of pseudostem (0.1136) and number of leaves (0.1036). On the other hand, the main factors that influenced garlic-scape yield were diameter of garlic-scape (0.8875), plant height (0.1585) and number of cloves(-0.1382).[Conclusion]Garlic germplasm had high-level genetic diversity. And the extremely significant correlation between agronomic traits was clearly indicated. The key agronomic traits which had influence on them were still significantly distinguished. The only exception was for the garlic-scape and bulb, the variety which grows higher had higher yield of garlic-scape, and the variety which had wider diameter of pseudostem had higher yield of bulb.关键词
大蒜/农艺性状/数学模型/产量决定因子Key words
garlic/agronomic trait/mathematical model/yield determining factors引用本文复制引用
孔素萍,孙敬强,吴雄,杨妍妍,霍雨猛,徐坤..大蒜主要农艺性状变异特征及其与产量相关构成分析[J].中国农业科学,2015,(6):1240-1248,9.基金项目
山东省农业良种工程 （）
