Ears with this combination are now available, and also F1 ears that can be used to produce material for demonstrating three-point linkage. This can be done in pots in the greenhouse. When the pots are laid on their sides, the normal, La plants will turn upward, the lazy plants will not. This provides a three-point test for la su gl4 at 55, 66, and 81 respectively in the chromosome 4 linkage map. The previously available stock was la su gl3, gl3 being at 112.
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