PJB-1994-12
DEVELOPMENT OF A HIGH YIELDING COTTON MUTANT, NIAB-92 THROUGH THE USE OF INDUCED MUTATIONS
R.M. SAEED IQBAL, M.B. CHAUDHRY, M.ASLAM AND A.A. BANDESHA
Abstract
Soaked seeds of an exotic variety 5toneville-231 (Gossypium hirsutum L) were treated with gamma rays at 30 kR from 60CO source having dose rate of 40 kR per hour and planted in the field as M1 genera fion during 1984. From the segregating generations, a high yielding mutant was selected and named as NIAB-92. The plant of NIAB-92 is a semi-haily, compact sympodial type of medium stature. It has 0-2 fruit bearing monopodial branches and more number of shorter sympodial branches as compared to the parent, Stoneville-231 and commercial cotton variety NIAB-78. The mutant is early maturing and matures twenty days earlier than the parent 5toneville-231. It has higher yield potential alongwith desirable fibre properties such as G.O.T.(%), fibre length, fibre fineness and fibre strength. In the comparative yield trials the mutant NIAB-92 significantly outyielded both the prevalent commercial cotton varieties i.e., NIAB- 78 and S-12. At NIAB it gave 15.3 % and 19.1 % higher yield than NIAB-78 and 5-12, respectively, while at farmers fields the increase in yield was 8.8 % and 14.1 % as compared with NIAB-78 and 5-12. The mutant has also shown resistance against leaf curl virus disease.
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