PJB-2003-95
DEVELOPMENT OF BASMATI RICE VARIETIES THROUGH THE USE OF INDUCED MUTATIONS AND RELATED TECHNIQUES
MUHAMMAD RASHID, AKBAR ALI CHEEMA, MUHAMMAD ASHRAF, ZIA-UL-QAMAR AND ZAHID MAHMOOD
Abstract
Several short stature (20-40 %), early flowering (7-21 days earlier) and long grain mutants/recombinants have been developed at NIAB through induced mutations and other breeding techniques in the traditional Basmati rice. The mutants with desired traits were hybridized with the traditional Basmati, which resulted in the derivation of desirable progenies showing good hybrid vigour. In the selected progenies of M 4 generation, mutants showed significant reduction in plant height (18.29-33.62 %). The mutant 39-1 which was short statured as compared to its counterparts, produced maximum productive tillers/plant (17.6) and outyielded along with some other mutants 15-2 and 15-3 as compared to their counterparts and checks. All the mutants possessed increased paddy length (10.00 mm-10.76 mm) and outclassed their respective parents exhibiting high L/W ratio. The recombinants exhibited improvement in grain yield due mainly to greater number of tillers per plant and increased spike fertility percentage. The physical grain quality parameters of paddy length, paddy width and their L/W ratio were also superior. From the yield trial, one of the mutants (EF-1-20-5-99) flowered 14 days earlier than the parent (Basmati-370) and standard Super Basmati and Basmati-2000 may be used in hybridization for the development of recombinants with even more desirable traits.
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