• 作者： 劉清
• 作者服務機構： 臺灣省農業試驗所
• 中文摘要： 本文導出當有互補、重複或抑制因子作用時，連鎖強度（或重組合值）之最大可能法（maximum likelihood method)及乘積法(product method)估算公式，各估值取樣變異之估算公式亦分別導出，同時證明在大樣品時，乘積法估值與最大可能法估值同等有效。 由F 資料估算連鎖強度時，正結(coupling）較反結（repulsion)狀態有效，但若由回交資料估算時則不盡如此。在反結狀態下，回交資料估算連鎖強度較由凡資料估算有效，但在正結狀態下則不盡如此。當有互補、重複或抑制因子作用時，連鎖強度之估值較無上述因子作用時之估值不精雜。 由F 花藥經組織培養而來之四種外表型（AB, Ab, aB及ab)之機率與由F 回交任何一親所得之四種外表型機率一致，故本文中用來估算回交資料連鎖強度之公式，亦可用來估算組織培養資料之連鎖強度。
• 英文摘要： Formulae for estimating linkage in cases involving complementary, duplicate or inhibiting factors arederived by the maximum likelihood method and by the product method. Sampling variances are calculatedfor all derived formulae, and the product estimate in large samples has a variance equal to that of themaximum likelihood estimate. Linkage intensities estimated from the coupling phase are more efficient than the repulsion phasefor FZ data. They are not always so for backcross data. Linkage intensities estimated from backcross dataare more efficient than from F data for the repulsion phase. This is not always so for the coupling phase.When complementary, duplicate or inhibiting factors are involved, the estimated linkage intensities arefound to be inferior to that of the normal case. Attention has been called to the fact that the probabilities of four phenotypes (Ab, Ab, aB and ab)from a tissue culture-of Ft anther are identical to those from a backcross of F to either parent. Therefore,the anther culture data may be analyzed as though they were the backcross data for linkage estimation.
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