Inheritance of leaf blight resistance in sorghum-sudangrass and sorghum-sorghum hybrids

Isao, T. and Kouichi, I. and Kamehiko, W. (1977) Inheritance of leaf blight resistance in sorghum-sudangrass and sorghum-sorghum hybrids. Japanese Journal of Breeding, 27 (3). pp. 216-222.

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Parents, F_1's and F_2's of two sorghum-sudangrass hybrids (resistantXsusceptible), two sorghum-sorghum hybrids (resistantXresistant) and backcrosses of 605A×Sweet Sudan were grown and inoculated with leaf blight organism, Helminthosporium turcicum, at Nishinasuno field in 1973. Although climatic condition in 1973 was unsuitable fcr studying leaf blight reaction, inoculation was very successful by using the newly developed field inoculation method. All of the F_1's, F_2's and BCI were resistant to H. turcicum. No segregation was observed in F_2's of resistantXresistant. In F_2's of resistantXSusceptible, the segregation of resistant and susceptible plant fits to the expected ratio of 3 : 1 that assumes a dominant monogenic inheritance corresponding with the previous report (TARUMOTO and ISwa 1975). The data in BC2, however, does not fit to the expected ratio of 1 : 1. This is considered to be due to lack of field resistance in most plants of BC_2 population

Item Type: Article
Author Affiliation: National Grassland Research Institute, Nishinasuno, Tochigi 329 27
Subjects: Crop Improvement > Genetics/Genomics
Crop Improvement > Plant Breeding
Divisions: Sorghum
Depositing User: Ms K Syamalamba
Date Deposited: 17 May 2012 10:38
Last Modified: 17 May 2012 10:38
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