Identification of a putative QTL affecting ear shank length

--E. A. Lee, L. L. Darrah and E. H. Coe, Jr.

Mo17HtxB73Ht F1 hybrids containing one, two or three doses of the short arm of chromosome two were generated using a B73Ht version of TB-2Sa. While evaluating these F1's as part of another study during the summer of 1991, we noted that a dramatic difference for ear shank length existed among the three dosage classes. Ear shank length was 2.3, 10.7 and 20.2cm for the one, two and three dose classes, respectively. This direct response to chromosome arm dosage suggests that a gene(s) affecting ear shank length is located on the short arm of chromosome two.

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