ASSIGNMENT OF LINKAGE GROUPS

Following the preliminary steps taken in 1955, the Coordinating Committee approached interested members concerning the assignment of linkage groups. The contacted members were requested to indicate their preferences and, inasmuch as possible, assignments were made according to first choices. The response to this call was most heartening, for, as the following list reveals, the major share of the work is already in the hands of members. Several members have been assigned to a single group if it is large or if it requires cooperative effort for other reasons. The final two categories of assignments in the list scarcely need explanation. The screening section is responsible for sorting out genes to their proper linkage groups, afterward referring them to their respective group workers for more precise location. The linkage relations of genes for disease resistance obviously require the cooperation of those workers with the facilities and experience for proper classification of resistant and susceptible seedlings.

                 Assignments

I.  Linkage Groups


Chromosome           Group                   Personnel

Chromosome 1,   linkage group III         Lesley, Soost                    
Chromosome 2,   linkage group I           Butler, (Jenkins, 0)
Chromosome 7,   linkage group X & XII     Bargham
Chromosome 8,   linkage grotip VI & VIII  Griffins, Rick
Chromosome 9,                             Rick
                linkage group II          Bohn
                linkage group  V          Burdick, Martens, 
                                          (Jenkins, f)
II. Screening unlocated genes: Kerr, Pollack

III. Linkage for disease resistance: Barham, Andrus, Gilbert, Reynard, Kerr.

IV. Unassigned groups: IV, VII, IX, XI (Dr. Butler has offered to handle these groups until they are assigned.)

A great amount of work must be expended even before we have only the framework of the tomato linkage groups. More volunteers would therefore be most welcome to participate in the work with the larger groups, the unassigned groups, or projects II and III. The need for raw materials is also great, so please help the program by sending new unlocated genes to the screening section. The cooperation of the entire membership in this very important fundamental work will be greatly appreciated.

Coordinating Committee.