몇가지 자포니카型 水稻 品種에 있어서 百葉枯病 抵抗性 遺傳子의 連關分析

Linkage analysis of gene related to bacterial blight resistance in several rice cultivars

In order to get necessary information to use different resistant genes to bacterial blight in Japonica rice breeding, Linkage relationship between resistant gene and marker genes were examined in F₁ and F₂ generations from 11 crosses. white hull was governed by a single recessive gene. Phenol positive reaction of Tamjinbyeo which is Japonica rice variety was governed by a single dominant gene. This ph⁺ gene belonged to the linkage group Ⅱ. The semi-dwarf height of Iri 374 was governed by a single recessive gene. This gene was designated tentatively as sd-7(t), which belonged to the linkage group Ⅱ. The Xa-1 gene identified in previous experiment was linked with the marker genes of linkage group Ⅱ, such as lg(liguleless), wh(white hull), Ph⁺(Phenol positive reaction), Pr(Purple hull), drp(dripping-wet leaf) and sd-7(t) (semi-dwarf gene of Iri 374) with the recombination value of 7.9, 14.1, 8.0, 22.7, 40.3 and 42.5 respectively. The recombination values between marker genes of lg-Ph⁺, lg-Pr, wh-Ph⁺, Ph⁺-Pr and lg-sd-7(t) estimated 16.4, 28.8, 10.4, 28.4 and 42.1 respectively. Therefore, the estimated serial loci were in the order of Igwh-Ph⁺-Xa-1-Pr-sd-7(t)-drp.