Statistical significance of a nls model in R

Question

I have some multiple linear models without intercept like below:

Y = a*X1 + b*X2 + c*X3

However this model is a linear model, but since it does not have an intercept we have to write it as a non-linear model in R:

model1= nls(Y ~ a*X1+b*X2, data = trainDat, start = list(a = 1, b=1))

The problem is that the summary(model1) does not give us the statistics of the model like F-statistics because it is not lm. How can we report the significance of these models in R?