• 作者： 李良
• 作者服務機構： 臺灣省農業試驗所嘉義農業試驗分所
• 中文摘要： 本研究係利用甘藷品系比較試驗三個地區二年所得之資料，統計分析甘藷塊根收量、粗蛋白質含量及塊根乾物量等三項性狀，在不同環境下品系間的穩定性。 據綜合變方分析結果，在所研究之塊根收量、粗蛋白質含量及塊根乾物量等三種性狀之環境間、品系間及品系與環境交感作用等之均方皆極顯著，因品系與環境交感作用明顯存在，顯示品系間生產力因環境之不同而有不同之表現。 依分析結果知，在三種性狀中，以64-HP-18為對環境呈平行性的反應，且其平均塊根收量及平均粗蛋白質含量均顯著高於對照品種，但其平均塊根乾物量與對照品種之差異不顯著，顯示64-HP-18為最具有一般適應性的品系。 各品系之平均塊根收量、平均粗蛋白質含量及平均塊根乾物重之高低與穩定性介值的大小之間，似無一定的明顯之相關關係。 由分析比較外表型與遺傳型的穩定性介值之差異情形結果知，兩種方法分析所得結果很為接近，（b-1）之絕對值比 的絕對值稍小，而 Dev. M. S./（MSE/r）值均比 較大。
• 英文摘要： The data of root yields, % crude proteincontent and dry matter yields obtained fromadvanced trials of newly developed sweet potatoentries grown in three locations over a periodof two years were subjected to stability analysis. The results of the combined analysis of va-riance for root yields, % crude protein and drymatter yields indicated that the mean squaresfor entries (or variety), environments and entriesx environment interaction were all highly signi-ficant. For the significance of the first orderinteraction, it showed that the relative perfor-mances of entries were quite different when theentries grown under various environments. Tai's proposed method were used to estimatethe stability statistics α and for each entriesor variety separately. The results indicated thatthe 64-HP-18 had the average stability over allenvironments. This entry showed a significantlyhigher mean root yields and % crude proteincontent than the check variety but the dry mat-ter yields was same as the check. Therefore,the entry "64-HP-18" would have the goodgeneral adaptability. In this study, it seems that no well-definedrelationship between the average performancesand the stability statistics of the 10 entrieswas observed. The root yields data were used for calculat-ing the phenotypic and genotypic stability sta-tistics in order to compare their differences.The results between them were quite close toeach other, only the absolute values of the (b一1）were slightly smaller than the corresponding values; and all the Dev. M. S./(MES/r)·werelarger than their respective values in thetrials.
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