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在很多有价值的品种中曾经鉴定到控制抗性的基因(见表2)。关于抗性的遗传性质,人们得到的结果各不相同。Pokhriral等(1962)指出,在品种Rionegro,Yakvui53,Frondozo
Genes that control resistance have been identified in many valuable species (Table 2). With regard to the genetic nature of resistance, people get different results. Pokhriral et al. (1962) pointed out that in varieties Rionegro, Yakvui53, Frondozo