大麥의 靑色糊粉層 遺傳子(bl’s)의 遺傳分離

Genetic segregation of blue aleurone genes(bl’s) in barley

The genetic segregation and epistatic effects of blue aleurone genes(bl’s) in barley were examined. And also the linkage relationships among bl genes and between each of bl gene and chlorina (fc) on chromosome Ⅰ and hooded(K) gene on chromosome Ⅳ were estimated. The conclusions of the experiments were as follows. 1. The blue aleurone characters in barley were considered to be controlled by 5 pairs of dominant complementary genes. Therefore the white aleurone phenotypes were resulted that any one of these genes is recessive homozygous state. 2. The Korean domestic cultivars of barley, Doosan #8 and Kangbori, which shows white aleurone color, seemed to be possessed bl₂ and bl₃ gene respectively. However about 10% of the blue aleurone kernels were segregated in the F₂ seeds of cross between Kangbori× Blx, as in the case of Kangbori cultuar itself. It is thought to another factor or factors are responsible for the expression of the bl₃ gene at recessive homozygous state in Kangbori. 3. The bl₄ gene which expresses the red aleurone color at the recessive homozygous state considered to show different epistatic effect upon bl and bl₃ gene respectively. 4. There were sparse linkage relationship between bl₅ gene of BGM₁₂₂ and bl₂ gene of Nepal, and it is postulated that the bl₅ gene is located on the distal portion of the long arm of chromosome Ⅰ. 5. The gene bl₃ and bl₄ showed linkage relationships with the genetic marker gene K respectively, and the possible gene order on the chromosome Ⅳ appeared to be bl-bl₃-K-bl₄, on the basis of the estimated recombination values.