I have read that most trees that are grown from seed turn up to be very different than the parent. For example, some sources claim that the chance to get good apples from an apple grown from seed is 1/25. However, I also read that self-fertile trees tend to grow fairly true to seed. I would expect that chances to get similar nuts to the nuts of the parent walnut would be much higher than the apple's offsprings. Still, I cound not find any evidence if English walnuts grow partially true to seed or not. I would like to know if someone has some statistics or has conducted an empirical evidence on that.