| A true breeding grass clump dwarf wheat L. E. EVANS Plant Science Department, University of Manitoba, Wpg., Canada In an earlier report CANVIN and EVANS (1963) reported near by normal growth and seed production in F1 grass clump dwarf wheat plants grown continuously at 26.5C. One of the crosses so treated was Marquillo x Kenya Farmer. The F1 and F2 generations from this cross were grown at 26.5C and all plants elongated and reproduced. A total of 99 F3 lines were grown in the field in the summer of 1963. Of these, three produced only grass clump dwarfs. Plants from these lines were transplanted to a growth chamber at 26.5C where several elongated and set seed. F4 and F5 lines have since been grown and have shown no segregation indicating that a homozygous line of grass clump dwarfs requiring high temperature for reproduction has been produced. Semi - dwarf, normal and winter habit plants have also been recovered from this cross. The inheritance aspects are presently under investigation. |