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:

Genes N Segregating for
new characters
χ2 for indep. test Recom. S.E.
 
pr - ws 104 3:1 P = .02 35.56.1
Wc - si?* 164 15:1 P = .02  
Y - gl_11 283 3:1 P = < .01 38.53.8
Y - w (in gl6 culture) 202 3:1 P = < .01 27.03.8
F1 - gls-3 276 3:1 P = < .01 12.03.6
gls-3 - tw?** 276 excess for 15:1 P = < .01 1.01.7
F1 -tw? 276 " P = < .01  
1 aleur. factor - tw3 579 " P = .01 38.06.2
F1 - tw3 218 " P = .02-.01  
gl - tw3 561 " P = < .01 28.05.6

*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