テンサイ根腐病に対する根冠部表皮および内部組織における抵抗性の発現

日本作物学会紀事

大潟 直樹¹  田口 和憲¹ 

[1] 農業技術研究機構 · 北海道農業研究センター

关键词: Heritability;    遺伝率;    Vertical section;    縦断面;    Sugar beet;    テンサイ;    Root rot resistance;    根腐病抵抗性;    Epidermis;    表皮;    Dominant effect;    優性効果;   

DOI  :  10.1626/jcs.73.42

学科分类：农业科学（综合）

来源: Nihon Sakumotsu Gakkai / Crop Science Society of Japan

【 摘 要 】

Expression of resistance to root rot at crown root and top of sugar beet was investigated in progeny of the cross between resistant and susceptible lines by the field inoculation test. Symptom on the epidermis of the crown root, interior tissue of the crown root in the vertical section and tops were examined separately. The heritability in a broad sense of symptom area on the epidermis of crown root was 67. 0%, and the symptom area in F1 and F2 populations showed continuous distribution around midparent value. This suggested that resistance to root rot at the epidermis of crown root was controlled genetically as a quantitative trait. Symptoms of the interior tissue developed from the epidermis, but the symptom area on the vertical section of the crown root of the resistant lines in F1 and BC1F1 populations was small and independent of the symptom area on the epidermis, showing a dominant effect of the resistan. The Heritability in a broad sense of the symptom area on vertical section was 98.6%. This fact and results of the segregation test in the F1, BC1F1 and F2 population suggested that one dominant gene controlled the resistance of the interior tissue of crown root. On the other hand, the resistance observed in tops under field condition was considered to be controlled by the same gene as that observed on the epidermis of crown root. Therefore, it could be possible to estimate the resistance to root rot by estimating the disease degree of the tops.

【 授权许可】

Unknown