植物生長調節劑在番石榴果實無子化之應用

Abstract

本省番石榴經濟栽培品種果實多為多子型，如能培育少子或無子果實，將可改善其品質及提高其經濟效益。本試驗以GA₃ 50, 100及150 ppm等三種濃度，分別進行蕾期除雄後噴一次，開花前及盛花期各噴一次，及盛花期噴一次等三種處理，結果顯示，三種濃度在蕾期除雄後處理誘致無核之效果最好，除大果種泰國拔外各品種均呈無核化現象；但各品種間之著果率均偏低在8%左右；濃度增高致150ppm時落果嚴重；果實果重變小至約正常果之一半，且呈畸形。 The fruit quality and economical valur of the commercial cultivated guava varieties in Taiwan are enormously reduced by the numerous tough seeds in the fruits. Therefore, the breeding for improved varieties with less seeds or seedless is desiable. This experiment was carried out by means of chemical treatments with different concentrations of gibberllic acid and rutin solution at different plant growth stages.