Genic analysis by reciprocal translocation method in rice.(A preliminary note)

Abstract

A number of lines homozygTous for reciprocal translocations were selected from the progeny of X-rayed plants of two rice varieties, Peiku (108) and Kisshin (521) as reported by the writer (CHANG 1955). Seme of them were crossed with glutinous rice varieties with different combinations of the genes for apiculus coloration (C and Sp). to investigate the linkage relation of translcations to these genes. The relation between F2 segregation and fertility was examined. As the results, it was found that in one of 9 strains of Peiku, and in two of 5 strains of Kisshin, the translocations might, be linked with the glutinous gene, g1. The recombination values between the interchange points and the glutinous gene were estimated to be 25% to 38%. Coloration at the apiculus did not show a significant relation with thosc translocations. The variations in heading date and plant height were compared between fertile and semi-sterile classes of F2 plants to see if genes for these quantitative characters are involved in the translocations under observation. In one strain of Peiku, a gene or genes controlling headingr date appeared to be linked with the translocation carried by the strain. In the other strain of Peiku and a strain of Kisshin, genes controlling plant height appeared to be linked with the translocation.