The occurrence and inheritance of certain leaf "spots" in Sudan grass
1942
Garber, R.J. | Chilton, S.J.P.
Of 464 lines of sudan grass selfed for 2 years or more and grown in the nursery in 1941, 400 carried red coloring, 59 tan, and the remaining 5 lines were apparently segregating for red and tan. All but five of the tan or segregating lines originated from plant material known to contain Leoti sorghum genes. Data are presented that corroborate those of previous workers in showing that the inheritance of red and tan color is contolled by a single difference with red dominant. No possible causal organisms were isolated in connection with the leaf spots under observation. In the red lines the spots were red or bordered with red and similarly in the tan lines the discolorations were tan. The F2 and F3 data from crosses involving three types of leaf spotting as well as observations made among seed lines of sudan grass indicate that the particular leaf spots under observation here are conditioned by inheritance but that the inheritance--disregarding color--is not simple. Leaf spots vary in size, shape, and number and in the time and place appearance on the host plant.
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