Evaluation of the Resistance of 111 Mango Germ-plasm Resources to Anthracnose
[Objective]Yunnan Province is an important late-maturing mango producing area in China.Anthracnose is an important disease in mango production.Understanding the resistance level of mango germplasm resources to anthracnose in Yunnan Province and evaluating the resis-tance can provide a scientific basis for excavating mango anthracnose resistance resources,mining disease resistance genes and breeding disease-resistant varieties.[Methods]The fruit samples of 111 mango germplasm resources common in Yunnan Province were collected and inoculated with Colletotrichum gloeosporioides pathogen respectively in laboratory.The disease incidence in the pathogen-inoculated fruit samples was investigated,and the results were used for calculating the dis-ease index.The anthracnose resistance grades for the tested mango germplasm resources were deter-mined according to the disease index,which were used to evaluate the disease resistance levels.[Results]There were significant differences in the resistance levels to anthracnose in the 111 tested mango resources,the disease index was 8.89-100,and the disease index was the lowest,in Guixiangmang 2 and the highest in Nandoumai.The disease resistance of the 111 mango germplasm resources tested were generally not high.It was found no immune germplasm,5 collections were highly resistant(around 4.50%),12 were resistant(10.81%),16 were moderately resistant(14.41%),25 were moderately susceptible(22.52%),35 were susceptible(31.54%),and 18 were highly suscep-tible(16.22%).[Conclusion]Guixiangmang 2,Gui 10,Cuba 2,Betty and Mexican mango had high resistance and could be used as resistance breeding resources to anthracnose.The results of this study preliminarily evaluated the resistance of common mango resources to anthracnose in Yunnan Province,and provided a reference for further using these resistant resources to breed disease resis-tant mongo varieties and mine the disease resistance related genes.
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