韓國 在來種 옥수수의 粒色遺傳

Inheritance of kernel color of Korean local maize

This study was carried out to clarify the inheritance of the kernel color of Korean local maize lines, especially on the the mechanisms of aleurone color inhibition observed in Chilbo waxy line and that of mottled color when Nulupzae was crossed with other lines, and that the color reappearance when two white colored lines were crossed. Nine local (flint) inbred lines, one collection which was classified as an ecotype by Choe in 1991, and one alien line were used to produce F₁, test crosses and F₂ seeds. The mottled kernel color observed in the combination of Danyang/Yunghee was determined by R and r alleles. The color inhibition was due to the inhibition gene (probably C1-I) presented in the Chilbo white line. The genotype for the purple dots on white aleurone tissue in a kernel, that appeares purple inbred lines such as Yunghee were crossed with Chilbo line, was C1C1C1-IRRR. The dilute and pale kernels in the aleurone tissue in the combinations crossed with Chilbo line were due to incomplete epistasis of C1-I for R gene. When Jewon white line was crossed with Nulupzae collection which has deep purple aleurone tissue, the depth of color in F₁ seeds was considerably various. The dark colored kernels in F₁ seeds showed extraordinary inheritance for segregation ratio and color pattern in comparison with light colored kernels. When two colorless inbreds were crossed the purple colored F₁ seeds, must be due to the complementary gene effects. Waesungri line crossed with FR805, P1213749 and IK/LE lines showed the segregation ratio of 27:37 in F₂, that indicated complementary reaction from three alleles concerning color determination.