CHARACTERIZATION OF POLLEN AND CMS PARENTS OF Brassica napus GENOTYPES AVAILABLE IN BANGLADESH

Abstract

An experiment was conducted at the research field of the Department of Genetics and Plant Breeding, Bangabandhu Sheikh Mujibur Rahman Agricultural University, Gazipur during the period from November 2007 to March 2008 to study the morphological characterization of Brassica napus. With a view to achieve this goal, twenty two (22) germplasm of Brassica nap us used as pollen parent and two CMS lines (Z, and Z,) used female parent. Results indicated a wide range of variation among the genotypes in respect of flower characters along with yield and yield attributes. Among the pollen parents. the genotypes Nap 9904 and Nap 2022 were found as early flowering, whereas the genotype Nap 9908 was the late for first flowering. Length of anther ranged from as long as 3.60 mm in Nap 2037 to as short as 1.88 mm in Nap 2057. Minimum anther breadth (0.693 mm) was produced by the genotype Nap 2037, while the maximum anther breadth was found in the genotype Nap 248 (0.916 mm). Length of filament varied from 6.22 mm (BARI Sarisha-S) to 8.338 mm (Nap 0130). More than 72% genotypes attained plant height ranged from 95.72 cm to 108.9 ern. The highest number of siliqua per plant was counted in Nap 205 (222.1) and it was the lowest in Nap 179 (63.3). Wide variability in respect of number of seeds per siliqua was exhibited among the genotypes and it was ranged from 16.80 (Nap 2022) to 28.65 (Nap 206). The highest seed yield (II g) per plant was recorded in the genotype Nap 206 and the lowest in Nap 2057 (2.56 g). Anther and stamen of pollen parents were larger as compared to CMS lines. In CMSZ, and CMSZ" the first flower opened at 38.67 and 38.0 days after sowing, respectively.