万寿菊DUS测试指南中初步确定的性状的功能及特征分析(英文)

Analysis on the Functions and Properties of the Preliminarily Determined Characteristics Listed in DUS Test Guideline of Tagetes L.

[目的]本文以万寿菊DUS测试指南研制过程中初步确定的性状为研究对象,研究了性状的功能及特征,探讨了该组性状在万寿菊DUS测试中的代表性和全面性。[方法]根据性状的功能及特征,通过对该组性状所描述的植株部位、性状的观测时期、表达方式和观测方式所进行的分析,说明了该组性状的组合在上述功能及特征上是否具有代表性和全面性。[结果]对于性状描述的植株部位,该组性状中有5个性状描述了植株整体形态,3个性状描述了茎部形态,6个性状描述了叶片形态,23个性状描述了花形态,1个性状描述了生理学特征。对于性状的观测时期,该组性状中有1个性状是在苗期观测,1个性状是在始花期观测,其他36个性状是在盛花期观测。对于性状的表达方式,该组性状中有10个质量性状、9个假质量性状和19个数量性状。对于性状的观测方式,该组性状中有30个性状采用群体目测方式(以一组植株或植株部位为测试对象所得到的一个群体观测值),8个性状采用个体测量方式(以单个植株或植株部位为测试对象所得到的多个个体测量值)。[结论]基于万寿菊的变异特点及形态特征,该组性状具有代表性和全面性,考虑了DUS测试的准确性和简易性,实现了性状在植株部位、观测时期、表达方式和观测方式上的合理搭配和构成。

[Objective] This study aimed to investigate the functions and properties of the preliminarily determined characteristics listed in DUS test guideline of Tagetes L., and explore the representativeness and comprehensiveness of this group of characteristics in DUS test. [Method] Based on the functions and properties of the characteristics, the described plant part （s）, observation stage, expression pattern and observation method of each characteristic were analyzed to illustrate the representativeness and comprehensiveness of the combination of this group of characteristics in above functions and properties. [Result] As for described plant part（s）, there are 5 characteristics describing plant as a whole, 3 characteristics describing stem, 6 characteristics describing leaf, 23 characteristics describing flower and 1 characteristic describing physiological feature. As for observation stage, there are 1 characteristic needing to be observed in the stage of seedling, 1 characteristic in the stage of beginning of flowering and other 36 characteristics in the stage of fully flowering. As for the expression pattern, there are 10 qualitative characteristics, 9 pseudo-qualitative characteristics and 19 quantitative characteristics. As for the observation method, there are 30 characteristics using VG as the observation method, and 8 characteristics using MS. [Conclusion] In view of the variation and morphological properties of marigold, this group of characteristics are representative and comprehensive, and ensure the accuracy and easiness of DUS test of Tagetes L., thereby achieving the reasonable combination of characteristics in described plant parts, observation stages, expression patterns and observation methods.