94 STUDIES IN GUJARAT COTTONS 
1918-19. 214 to 289 or a variation from the mean of 14°9 per cent. 
Several strains have been isolated in which the number of bolls 
required to yield one pound of kapas is almost constant in any one season. 
Thus the progeny of different plants of one pure line gave the following 
numbers in certain cases. 
(1) 217 and 214 froma parent giving 220 bolls per pound of kapas. 
(2) 186, 193, 208 and 210 bolls per pound of kapas (parent not 
recorded), 
(3) 249 and 241 from a parent giving 241 bolls per pound of kapas. 
(4) 273 and 288 bolls per pound of kapas. 
In these cases the variation from the mean among the progeny is only 
0:7, 65, 1°6 and 2°6 per cent. respectively. and in the cases where the 
character of the parent was recorded, the variation is 2°8 and 3°3 per cent., 
though the parent and the progeny were grown in different seasons. 
3. The proportion of bolls borne on primary fruiting branches is heredttary. 
It is well known that in all herbacewm cottons there are three positions in the 
plant in which bolls may be borne. They may arise on secondary or tertiary 
branches, borne either on monopodia near the base or on vegetative axillary 
shoots growing in the upper part of the plant ; and they may occur on primary 
fruiting branches arising directly from the main stem. In most species of 
cotton, the last kind of bearing is almost exclusively found : in herbacewm 
cottons, the former kind has a very important share in the number of bolls 
and hence in the quantity of kapas produced. The proportion of the total 
number of bolls borne on the primary fruiting branches seems, however, to 
be constant for a pure strain in Goghari cotton. 
The following table gives figures showing how the progeny of selected 
plants of each strain are constant in this factor. 
Table showing percentage of boils borne on primary fruiting branches. 
Percentage 
Strain A26 1918-19 1919-20 
Progeny of plant 1 oe A ae ae 30°6 va 
Progeny of plant 2 . te ae 30°3 
Strain B3 
Progeny of plant 1 - 
3 36°8 
Progeny of plant 2 “he aE ae A 35°0 oe 
Strain B21 
Progeny of plant 1 Be Ae aie ae 21°6 we 
Progeny of plant 2 cs ¥ ae a 225 
Strain C22 
Progeny of plant 1 ied 33:3 
Progeny of plant 2 és ae oi 3% 29°0 
Progeny of plant 3 Se se 5 ae 29°0 
Progeny of plant 4 ‘ 28°8 ; 
