7. Trisomic tests with unlinked genes. Trisomic tests for chromosome 6 and the following genes wore negative: zb, gl6, gl9 (trisomic plants had an excess of gl progeny as compared with the 2n), and v9. A seedling dwarf (one of Stadler's designated temporarily as ds-3) may be in chromosome 6 by this trisomic test.
Linkage data with other factors were obtained along with the tests for linkage in chromosome 6. The possible linkages are as follows:
|χ2 for indep. test||Recom. ±S.E.|
|pr - ws||104||3:1||P = .02||35.5±6.1|
|Wc - si?*||164||15:1||P = .02|
|Y - gl_11||283||3:1||P = < .01||38.5±3.8|
|Y - w (in gl6 culture)||202||3:1||P = < .01||27.0±3.8|
|F1 - gls-3||276||3:1||P = < .01||12.0±3.6|
|gls-3 - tw?**||276||excess for 15:1||P = < .01||1.0±1.7|
|F1 -tw?||276||"||P = < .01|
|1 aleur. factor - tw3||579||"||P = .01||38.0±6.2|
|F1 - tw3||218||"||P = .02-.01|
|gl - tw3||561||"||P = < .01||28.0±5.6|
*This silky is one that appeared in an F2 of a single cross here.
**This tw was linked in coupling with the gls-3, one of Stadler's mutants.
Negative results by the χ2 for independence test were obtained for the following linkage tests: zb with lg; ws with Y Pl B rg; gls-1 with B lg nl?; nl? with B lg; ds-3 with su, pr Y colorless aleurone (9:7). gl6 with Y; gl9 with Y bt? and zg3 with Y and colorless aleurone (3:1).
C.R. Burnham and N. Klein