1952 Volume 2 Issue 2 Pages 81-88
l. This work is one of the stucdies in whichthe writers intend to make cle.ar the modes of quantitative inheritance in main crops from the view point of breeding. Materials used are the same as those used for the study on the inheritance of panicle already des cribed in the previous reports (SYAKUDO, et al. 1952.), namely the F1-F5 generations from the hybrids of "NABESIMA" and"KAIRYO-AIKOKUHEN-DAIKOKUGATA", whlch were crossed m 1945 at tne plant-breeding laboratory of the KYOTO Univ. The total numbers of lines and ir!-dividuals observed are l, 137 and 85, 616 respectively. 2. "NABESIMA" is a normal variety Showing a medium length of panicles and also a medium culm height (about 90 cm.), while 'KAIRYO AIKOKUHEN-DAIKOKUGATA" is a dwarf variety with short panicles and short culm height (about 70 cm.). 3. The methods of investigation are the same as those already described in the previous report (SYAKLTDO, 1948-C). 4. The progeny test in regard to the culm height was made considering the mean value, standard deviation, coefiicient of variabilitvy and the range of variance.The results show that the two multiple genes H2 and H3 and a dwarf gene D1 determine the culm height.The accumulative effect of the gene P4 and P5 (SYAKLTDO et al. 1952) to the culm height are of imperfect dominance, while that of D1 is of perfect dominance. The genotypes of the parents wiil be assumed as follows:-
