HACKENSACK, N.J. — The trial of a Wood-Ridge man accused of beating a woman to death and setting her body on fire will mark the first time that a jury in New Jersey will consider evidence in a murder case based on a “next generation” test that can analyze the DNA from just a few cells of biological material.Key evidence that authorities say links Daniel Rochat to the crime was extracted from traces of blood — found in a kitchen sink more than a mile from where the woman was killed.Rochat, 40, is behind bars, awaiting trial …