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在夏威夷,由棕榈疫霉(Phytophthora pa-lmivora)引起的根腐病是番木瓜最严重的病害之一,已有人发现某些番木瓜品系对该病具有抗性。本研究通过对一般结合力(GCA)和特殊结合力(SCA)的估算,以推测番木瓜亲本和杂交后代抗根腐病遗传结合力的强弱。由于5个番木瓜近交系“Waimanalo—23”(以下简称“W—23”)、“W—24”、“45—T_(22)”和“Higgins”在田间和温室均对根腐病具有各种不同的反应,因此选用它们作为杂交亲本。这
In Hawaii, root rot caused by Phytophthora pa-lmivora is one of the most serious diseases of papaya, and some papaya lines have been found to be resistant to the disease. In this study, we estimated the general binding ability (GCA) and special binding capacity (SCA) to estimate the genetic resistance to root rot in papaya parent and hybrid offspring. As a result of five papaya inbred lines “Waimanalo-23” (“W-23”), “W-24”, “45-T 22” and “Higgins ”In the field and the greenhouse all have different reactions to root rot, so they are selected as hybrid parents. This