Mapping of quantitative trait loci controlling adaptive traits in coastal Douglas-fir. II. Spring and fall cold-hardiness. - Jermstad,K..D..; Bassoni,D..L..; Wheeler,N..C..; Anekonda,T..S..; Aiken,S..N..; Adams,W..T..; Neale,D..B.. (Theoretical and Applied Genetics, 2001)