Performance of Source Nursary of Pollen Parent and Cms Lines of Brassica napus L.


  •  S. C. Saha    
  •  Sabina Yeasmin    
  •  A. K. M. Aminul Islam    
  •  M. G. Rasul    
  •  M. A. K. Mian    

Abstract

The study was conducted with the objective to know the performance of floral and yield characteristics of pollen and CMS parent. Significant variation was observed for flowering and yield contributing characteristics among two CMS lines (Z1 and Z2) and 21 pollen parents. The pollen parent Nap2019 was found as early flowering whereas the parent Nap2013 was the late for first flowering. The highest length of anther was found in Nap9907 and short anther in Nap9905. Slender anther was produced by the genotype Nap2037 and bold anther was produced by the genotype Nap9907. Length of filament was the highest in Nap2012 and the lowest in Nap0130. For yield contributing characteristics, the genotype Nap9906 matured earlier than all other genotypes while the maximum duration took by Nap2013. The longest inflorescence was found in the genotype Nap2001 and the smallest in Nap9906. The highest number of siliqua per plant was counted in Nap2066 and it was the lowest in Nap9906. Wide variability in respect of number of seeds per siliqua was exhibited among the genotypes and it was the lowest in Nap9901 and the highest in Nap94006. In case of 1000-seed weight, the genotype Nap2022 produced larger seeds and the genotype Nap9907 produced smaller seeds. The highest seed yield per plant was recorded in the genotype Nap2066 and the lowest in Nap9905. In case of CMSZ1 and CMSZ2, 50% plants were flowered within 45 days after sowing. The CMS plant produced small, slender anther with shorter filament compare to pollen parents. The out crossing rate of CMSZ1 and CMSZ2 was 40.31% and 47.96%, respectively. Time required for days to 80% maturity of CMSZ1 and CMSZ2 were about 106 days. The number of siliqua per plant was found the highest in CMSZ1 and the lowest in CMSZ2. The average number of seeds per siliqua and seed yield per plant was recorded the highest in CMSZ1 and the lowest in CMSZ2. The pollen parent with desirable performance and CMS parents CMSZ2 having higher out crossing rate can be used for future Brassica napus hybrid breeding program.



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