張龍生2006-07-262018-06-292006-07-262018-06-291998http://ntur.lib.ntu.edu.tw//handle/246246/18189木瓜輪點病毒病嚴重影響木瓜產業，除了台農五號木瓜品種為耐病品種外，目前本 省尚無高抗品種，因此本研究調查木瓜品系（種）間感染木瓜輪點病毒後的抗病性表現， 並以半互交分析方法估算木瓜人工接種木瓜輪點病毒後與產量、果實糖度等相關性狀之 遺傳組合力，作為木瓜抗耐病育種之參考。各參試品系（種）經接種木瓜輪點病毒後種 於田間，以不經接種者栽植於網室中作為對照。木瓜接種木瓜輪點病毒後會降低感病品 系的產量、果實可溶性固形物含量及果重，但抗病的品系如台大選系二(NTU.2-1-0-0) 的平均果重則高達882.9g，且果實品質與網室栽培的經濟品種沒有差異。此外，病害發 展曲線下的面積(AUDPC)與各抗病性狀、重要園藝性狀間呈極顯著相關，可供作抗病性 的直接指標，再者田間接種木瓜輪點病毒之品系(種)其莖幹截面積生長量、平均葉寬及 葉數、AUDPC 與產量等性狀表現型的一般組合力(GCA)效應均顯著，顯示累加性遺傳 變異大，抗病能力可隨世代增進而增進。而果實的可溶性固形物含量、平均葉數及 AUDPC 等性狀之特殊組合力效應皆顯著，欲獲取高糖度的雜交組合則需選定特定親 本。A half-diallel including 6 selfing and 15 single crosses was preformed to estimated the general combining ability, and thc specific combining ability for important horticultural traits including yield, fruit total soluble solid contents, plant height increment, stem cross sectional area increment, and areas under disease progress curve for papaya breeding lines resistance to papaya ringspot virus (PRSV-P). The papaya seedlings were planted in the field then inoculated with severe mottle with necrosis strain of PRSV-P three weeks after planting. The visual symptom rating were investigated 3 weeks after inoculation and repeated once of every month. Very significant differences were among lines. For these traits, the variance was partitioned into general, and specific combining effects. General combining ability was more important than the specific combining ability except fruit total soluble solid contents. The general and specific combining ability were estimated in the study.application/pdf39414 bytesapplication/pdfzh-TW國立臺灣大學園藝學系暨研究所木瓜抗病育種一般組合力特殊組合力papayadisease resistancepapaya ringspot viruscombining abilityand specific combining abilityreporthttp://ntur.lib.ntu.edu.tw/bitstream/246246/18189/1/872313B002033.pdf