品种区域试验主要决选指标及其参数的研究——Ⅰ.丰产性

文章认为,丰产性、丰产重演性、适应性及稳定性四者,是品种主要生产性能的最高表现,应作为品种区域试验的主要决选指标;并均应统一以适当参数加以定量表述,从而使总结评定共同建立在对参试品种的科学分类基础之上。本文建议,区试中意义准确、完整的丰产性,应按以下三参数合并表述,即:经过相应加权校正的(平均)丰产水平Yi/以对照品种为参照物兼示差异显著性的丰产指数I_Y*,**/兼示邻位差异显著性的丰产位次N*,**;对区域化鉴定中具关键作用之丰产重演性,建议分作不同可靠程度的增产重演R_i*,**、达标重演R_(?)*,**、高位重演R_(N)*,**三级,以重演性参数f(P)——连年及基本连年重演试点数(或重演面)表述之;并强调指出乃区试之核心。

A STUDY ON THE MAIN SELECTION INDEX AND ITS PARAMETERS IN CULTIVAR REGIONAL TEST

This paper points out the four properties of cultivar. i. e. the prolificacy, the prolific repeatability. the adaptation and the stability are most important performance in cultivar productness. These four properties should be considered as main selection index in cultivar regional test: in order that the estimation and conclusion of tested cultivars was based on the same scientific ciassfication, the four properties of cultivar should be expressed quantitatively in proper parameters.The paper suggests that correct and perfect signification of prolificacy should be expressed by three parameters together as follows: (?)i weighted correction for mean in prolificacy level: Iy (prolific index), Comparision with check cultivar ((?)ck) and significance of difference; N, prolificacy rank of tested cultivars.The prolific repeatability, it have key action in regional test, can be expressed in three degrees as follows: Ri, the repeatability of increased Yield; Rs. the repeatability of standard-reached and R_N, the repeatability of high rank in tested cultivars. All of these can be expressed by repeatability parameter f(p), i. e. sum or percentage of repeatability in all of tested years and locations. It is emphasized that the repeatability is nuclear problem in regional test.