YIELD PERFORMANCE OF RAPESEED MUTANTS AT M8 GENERATION
To study the performances of rapeseed mutants based on seed yield and yield attributes experiments was conducted at various locations of Bangladesh. Analysis of variance showed highly significant variations among the mutants and check for most of the characters studied in individual location and combined over locations. Interaction between genotype and location also showed significant variations for all the agronomic traits. Mutant RM20 produce the highest plant height (101.1cm) and mature earlier than all other mutants. At BINA Sub-station farm Ishurdi and Magura all the mutant produce significantly higher number of siliquae plant-1 then parent BARI Sarisha-15 and check BARI Sarisha-17. RM-18 and RM-20 produce maximum seeds siliquae-1 (30) whereas; the mutant RM07 produced lowest number of seeds siliquae-1 (22). Combined means over locations showed that mutants namely RM-18 and RM-20 produced significantly higher seed yield (1551.1 and 1385 kg/ha, respectively). These two mutants had also higher number of siliquae than the mother variety. This suggests that gamma rays irradiation can be fruitfully applied to develop mutants with higher seed yield and other agronomic traits in oleiferous Brassica.
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