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題名 | 非介量穩定性分析法之研究(2):農業觀念之穩定性選拔 |
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作者姓名(中文) | 呂秀英; 曾清田; | 書刊名 | 中華農學會報 |
卷期 | 164 1993.12[民82.12] |
頁次 | 頁1-16 |
分類號 | 430.28 |
關鍵詞 | 穩定性; 非介量法; 順位; 農業觀念; 玉米`; Stability; Nonparametric method; Rank; Agronomic concept; Maize; |
語文 | 中文(Chinese) |
中文摘要 | 為有效地將非介量統計分析的觀念應用於農業試驗資料,以選出符合農業觀念的穩定品種,提高非介量法在農業應用上之可行性與利用價值,本研究配合本省1986-1987年之玉米綜合品系區域試驗的資料進行應用分析,在所有基因型有相等穩定性之虛無假設下,就每一環境內按不同基因型之性狀觀測值減去基因型效應與環境效應的矯正值(x**□)進行排序,此與Nassar-Hühn (1987)方法中僅減去基因型效應的矯正值(x*□)所決定之順位,理論上各相當於農業或生物觀念之穩定性,但結果發現,兩者所得之順位結果完全相同。因此非介量測量值不但較少受統計前提之限制,操作簡便,可在直線迴歸模式不適用時以彌補不足,也同時有利於選拔出符合農業或生物觀念的穩定品種。由相關分析結果得知,兩個非介量穩定性測量值(絕對順位差與順位變方)在統計意義之解釋上雖然不同,但其間則存在極顯著之正相關;而非介量穩定性測量值與迴歸離差均方之間亦存在顯著的正相關關係。 |
英文摘要 | The purpose of this study is to establish the nonparametric measures for stability according to the agronomic concept. The applicability of theoretical results is demonstrated by analyzing data from the 1986-1987 regional trials of maize composites in Taiwan. Under the null hypothesis of equally stablility among genotypes, the rank orders of genotypes in each environment are determined by corrected values which depend on genotype-interaction effect (x**□) rather than on genotypic effect (x*□, Nassar and Hühn 1987). An analysis of phenotypic stability which performed by ranking these corrected values x**□ and x*□ is analogous to the stability of agronomic and biological concept, respectively. However, they result I the same rank orders. Hence, nonparametric measures for stability based on ranks provide an useful alternative to existing parametric measures. They require less statistical assumptions and are easy to use. Using this approach, stable genotypes can be defined as both types of stability concept. Correlation analysis revealed that the two nonparametric stability measures (mean absolute rank difference and variance of ranks) are strongly intercorrelated with each other even they have different statistical interpretation. The results also indicated that the nonparametric measures are significantly correlated with the deviation mean square from regression. |
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