MORPHOLOGICAL AND BIOCHEMICAL STUDIES OF W117 TETRAPLOID S_(18) SUBLINES PRODUCED BY COLCHICIN TREATMENT AND SUBSEQUENT GAMMA IRRADIATION

摘要

Regarding the morphological characters, there were differences in plant height, growing period, 1000 kernel weight and kernel colour among the W117 sub-lines. Sublines 5 and 7 flowered 3-4 days later than the others; moreover, they possessed the highest 1000 kernel weight (260.6 and 279.2 g, respectively). After 18 years of inbreeding, the W117-7 subline showed the highest inbreeding depression in plant height; it was only 124.0 cm tall. Subline 2 differed in kernel colour from the other sublines.rnOf the eleven allozyme loci, seven (Adhl, Dia, Sad, Px, β Glu, E8 and Idh) showed polymorphisms in the W117 sublines. The maximum number of alleles of a given locus was three.