FIELD RECORDS OF BREEDING WORK. 49 



identified by a distinctive name, as for example, in the case cf the Connecticut 

 Sumatra strain, type, 2 (Green leaf) ; type, 4 (Broad leaf). 



Selection numbers. — The individual plants selected for propagation should be 

 given numbers which will serve to identify them, as well as the type and the 

 generation to which they belong. Each plant is represented by a combination 

 of numbers, the first one representing the series and usually corresponding to 

 the type in which the plant belongs. Each succeeding number represents the 

 individual parent plants in that generation, the last being the number of the 

 individual selection in the last generation. For example, in the experiments 

 with the improvement of Connecticut Sumatra tobacco in the second generation 

 of selections the following numbers have been used : 1-5-6. The first number 

 (1) refers to the series, and, in this case, to type 1 in the Connecticut Sumatra 

 strain; the second number (5) refers to the number of the seed plant selected 

 and used for planting the second generation; the last number (6) refers to the 

 seed plant saved for planting the third generation selected from the crop raised 

 from plant No. 1-5 ; while 2-3-8 refer to a selection of the green leaf Connecticut 

 Sumatra type, plant No. 3 of the first generation, and plant No. 8 of the second 

 generation selected from crop raised from No. 2-3. 



Hybrid numbers. — The general plan of assigning numbers to tobacco hybrids 

 is similar to the system followed in the selections except in the case of the type 

 number, which consists of a figure and a letter. The letter is added to the 

 figure in order to distinguish the hybrids from the selections and may be used 

 to identify the individual hybrids of similar parentage. A different type 

 number should be given to each series of hybrids, and a different letter to each 

 hybrid within the series, as, for example, 41a, 41b, and 41c refer to individual 

 hybrids between Connecticut Havana and Connecticut Sumatra ; 42a to hybrids 

 between Connecticut Havana and Connecticut Cuban, and 43a to hybrids between 

 Connecticut Broadleaf and Connecticut Cuban, respectively. The hybrid numbers 

 should not be duplicates of the selection numbers. 



Assignment of numbers. — In order to prevent confusion arising from using 

 the same numbers in different sections, it is proposed to assign certain numbers 

 to each natural center of breeding experiments. These numbers should be 

 consulted before new numbers are given to types or hybrids. The numbers 

 from 1 to 100, inclusive, are assigned to the Connecticut Yalley experiments ; 

 101 to 200, inclusive, to the Florida experiments, and 201 to 300, inclusive, 

 to the Maryland experiments. 



The names of the established varieties of cigar-wrapper tobaccos grown in 

 the Connecticut Yalley are (1) Connecticut Havana;- (2) Connecticut Broad- 

 leaf ; and the varieties introduced in an experimental way which are grown 

 to a limited extent under cloth shade are (1) Sumatra and' (2) Cuban. A 

 number of distinct strains of Sumatra and Cuban varieties grown from im- 

 ported seed have been produced and are recognized as modified types of the 

 Sumatra and Cuban tobaccos, so that in order to distinguish these types from 

 the imported varieties they should be known as Connecticut Sumatra and 

 Connecticut Cuban tobaccos. The types which have been selected for experi- 

 mental purposes are as follows : Connecticut Sumatra type : 1, Crumple : 2. 

 Greenleaf ; 3, Sumatra ; 4, Broadleaf ; 5, Belgian ; 6, Abnormal ; 7, Smoothleaf ; 

 8. Freak ; 0, Mosaic ; 10. Mongrel ; 25. Holcomb Hollow ; 27, Resistant ; 28, 

 Diseased. Connecticut Cuban type: 11, Cuban; 12. Dark Green; 13. Havana; 

 14. Freak. Cuban : 20, Imported Cuban. Connecticut Havana : 36, Cooley. 

 Connecticut Broadleaf : 50, Brewer ; 55, Favorite. 



15507— No. 96—07 m 1 



