2. Trisomic and backcross tests, group 2, involving albescent, liguleless-1, and yellow endosperm. H. S. Perry

F2 data from the cross of #2 trisome carrying lg1 x al show that al is in chromosome 2.

+ + + lg1 al + al lg1   % lg1 % al
81 61 14 0 = 156 - 39 9
490 42 47 0 = 579 - 7 8
  Total    735     8.3

The suggestion of close linkage between al and lg1 seems to be confirmed by a diploid F2 progeny, as follows:

+ + + lg1 al + al lg1   % lg1 % al
101 51 43 0 = 195 - 26.2 22.1

Per cent crossing over < 15.


F2 progenies involving Yx and al have indicated close linkage between these two genes. Backcross counts confirm this linkage, as follows:

Yellow Not yellow
Al al Al al
186 0 0 169

Two seedlings from seeds with yellow endosperm and one from non-yellow, are still too small to classify.