水稻穗著粒密度之研究Ⅰ.穗著粒密度類型之分類、預測模式之建立及其相關性狀之探討

Abstract

本研究使用34個水稻品種（系）為材料，探討穗著粒密度類型與相關性狀之關係，經以10個與穗著粒密度相關的性狀進行主成份分析，結果發現第一主成份(Z1)主要與長度因子、二次枝梗因子和每穗粒數有關；第二主成份(Z2)主要與穗重、一次枝梗因子和每穗粒數有關；第三主成份(Z3)主要與穗軸長、一次及二次枝梗數、二次枝梗總粒數與每穗粒數之比值有關；至於第四主成份(Z4)則主要與穗長、一次枝梗數及其平均粒數有關。Using 34 rice cultivars/lines as materials, the principal component analysis was performed to elucidate the relationships between the panicle density parameters and its 10 related characters. Results showed that the first principal component (Z1) was mainly concerned with the length factor, the primary branch factor and the total number of spikelets per pancile; The second principal component (Z2) was largely due to the pancile weight, the primary branch factor and the total number of spikelets per panicle; The third principal component (Z3) was mainly associated with the length of rachis, the number of primary branches, the number of secondary branches and the ratio of the total number of spikelets of secondary branches and the total number of spikelets per panicle; while, the fourth principal component (Z4) was mainly performed by the pancile length, the number of primary branches and the average number of spikelets per primary branch.