98 STUDIES IN GUJARAT COTTONS 
a heavy-seeded variety remains relatively heavy-seeded however the 
environmental factors may vary. 
Closely connected with this study of some of the characters of Goghara 
eotton which we have proved to be hereditary, we may note the results of our 
inquiry into the correlation between the shape and size of the bolls in Goghare 
cotton and the ginning percentage. In commencing selection work on this 
cotton in 1914-15, we relied on this character of the bolls as being a favourable 
basis for selection as a result of statements by several authorities that boll 
characters were intimately associated with length of fibre. Thus O. F. Cook! 
states definitely that there is a correlation between the length of the boll and 
the length of the fibre. Kearney? also, in his study of breeding in Egyptian 
cotton, ventures the statement that ‘‘ the size of the bolls must be considered, 
Metta be ots because this character is intimately associated with length of fibre.” 
He does not give any evidence for this, and we cannot find the evidence on 
which it was based. Main? held the same opinion, and stated that in 
1911=12 he made the “ interesting observation that a correlation exists in the 
indigenous cottons between the ginning percentage on the one hand and the 
shape of the bolls on the other.”’ A broad-shaped boll was found to be asso- 
ciated with a higher ginning percentage in the kapas. He, however, does not 
give the evidence on which he based this statement. 
After six years’ work on the subject we have to say that we have failed 
to find the correlation expected ; although all our selections were originally 
made on the basis of the size and shape of the bolls, yet the pure strains we 
have developed from them have not given a ginning percentage which varies 
in any sense according to their origin. The following table shows this :-— 
Ginning percentage 
Strain Boll characters 
1916-17 1917-18 | 1918-19 | 1919-20 
A26 Spherical and large | 44°6 42°7 45°9 42°5 
B3 Tapering and large 42°6 42°9 45°4 46°9 
B2) Tapering and medium size | 45°4 42°6 45°5 44°8 
C22 Spherical and small | 46°] 42°5 45°7 47°6 
1 Bulletin 159, U. S. Dept. Agri. Bur. Plant Industry, p. 45. 
2 Bulletin 200, U. S. Dept. Agri. Bur. Plant Industry, 1910, p. 11. 
8 Annual Report Surat Experimental Station, 1911-12 ( Bombay, 1912 ). 
