[关键词]
[摘要]
目的研究五味子种质雌花心皮数的精确估算方法及其变异规律,为五味子种质资源的收集、评价和品种选育提供理论依据。方法采用资源调查和统计分析相结合的方法。结果采用公式y=5x+n(y:心皮数;x:各行一致心皮数;n:顶端心皮数)对五味子雌花心皮数的估算值与实测值差异不显著。五味子种内雌花心皮数的变异系数为14.33%,种质平均心皮数19.5~44.0枚。五味子种质雌花心皮数与心皮坐果率呈极显著负相关;雌花心皮数同心皮坐果率的乘积与果穗质量、果穗果粒数呈极显著正相关;雌花心皮数与同节位雌花数呈极显著正相关;不同粗度枝条雌花心皮数差异显著。结论公式y=5x+n可较精确估算五味子雌花心皮数。五味子种内雌花心皮数存在较大变异,可作为五味子种质资源收集、评价及品种选育的重要性状。进行雌花心皮数评价时需注意取样的代表性和典型性。
[Key word]
[Abstract]
Objective To study the accurate estimated Methods and its variant law of female flowercarpellary number of germplasm resources and supply a theoretical base for the collection,evaluation,andbreeding in Schisandga chinensis.Methods The combination of germplasm resources and statisticalanalysis was used.Results The difference was not significant between the estimated data and the actualnumber of female flower carpellary number by using the assumed formula of Y-5x+,l(y;carpellarynumber;z:same carpellary number per rOW;n:apical carpellary number).The coefficient of variationwas 14.33% ;the carpellary number was 19.5-44.0.The carpellary fruit set ratio was negative correlated significantly with carpellary number;cluster weight and berry numbers were positive correlatedsignificantly with the product of carpellary number and fruit set ratio;female flower numbers of the samenode were positive correlated significantly with carpellary number;the carpellary number was signficantlydifferent among the branches of various diameters.Conclusion Carpellary number could be estimatedaccurately by the formula of y5 5xin S.chinensis.There existed a big variation in female flowercarpellary number in germplasm of S.chinensis,and the carpellary number can be used as a majorcharacteristics in collection,evaluation,and breeding of S.chinensis.More attention should be paid tO therepresentativeness and typicalness of sampling in the evaluation of carpellary number.
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[基金项目]
科技部国家科技基础条件平台工作重点项目(2003DEA3N032)