Rindless culm (rlc) gene derived from Dangjin inbred
--Heebong Lee, E.H. Coe, Georgia Davis and Bongho Choe
This study was carried out to identify the location of the gene for
rindless culm (rlc), which was derived from Dangjin, a Korean local
maize line selfed six generations at the Genetic and Breeding Lab, Coll.
of Agri., Chungnam Nat'l. Univ. (Korean J. Breed. 24:42-47, 1992). Materials
used were F2s from crosses of waxy translocations with rlc. F2 kernels
were separated into waxy and
normal seed, and these were grown in 1994 at Columbia, Missouri. The expression is shown in Figure 1; the plants could be distinguished for rindless culm and normal after tasseling.
Chi-square analysis of the waxy translocation tests indicated that the rindless culm gene is linked to T9-10b (Table 1). All 13 plants from waxy seeds displayed normal culms, while non-waxy seeds showed segregation of normal and rindless culms. This places the rlc gene near T9-10b, which has a breakpoint at 0.4 on the short arm of chromosome 10.
Table 1. Rindless and normal segregations from waxy translocations crossed
with Dangjin rindless inbred.
1. Rindless culm plant after tasseling. Variable fractions of the culm
in the upper few internodes display absence of rind, extending from node
to node in sector-like fashion but increasing in degree.
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