果樹產量組成因素分析與應用

Abstract

本報告敘述標準化淨迴歸係數的估算，並比較迴歸係數、相關係數、以及標準化迥歸係數的產量。標準化淨迥歸係數可用來比較迴歸方程式各個獨立變量的迴歸係數應變量的重要程度，故可用來分析複合性狀一產量。本報告利用S. Wright的天竺鼠為實例說明路徑係數分析圖，藉以闡明各個因素對天竺鼠出生後33天體重的影響。對複合性狀組成因素認知愈清楚，所得到的路路徑係數分析圖將更為準確。產量組成要素的分析即利用此分析系統估測產量組成因素對產量的重要性，育種家可利用產量組成因素的分析供做選種與雜交的憑藉來達成產量育種的目的。 (1) Standarrdized partial regression coefficient is the direct path coefficient, which can be used to determine the relative. (2) Path coefficient analysis can be used to evaluate the relationships between yield components using causatine relationships. (3) Selection for individual yield components is more efficient than selecting for yield itself. (4) Plant breeders can seperate yield into the product of its part and choose parents selected for their independent yield components superiorities. (5) More information is needed concerning the genetic control of yield components, especially for fruit tree crop breeding.