NEW PLANT TYPE GENOTYPES IN BRASSICA RAPA L.
Amatullah Shakera*, Md. Shahidur Rashid Bhuiyan, Naheed Zeba, Md. Golam Robbani and Md. Akkas Ali
Corresponding author: email: shakera.sau@gmail.com
Abstract
The experiment was carried out to study the mean performance, heritability and genetic gain of yield and its components and to find out new plant type genotypes of Brassica rapa. A total number of 23 (Twenty three) materials were used in this experiment where three were checks varieties, twenty were F3 and F4 segregating materials. The genotype BARI Sarisha-15 × SAU Sarisha-2 of F3 and F4 population and the widely cultivated check variety BARI Sarisha-15 required almost similar days to mature showing almost similar number of seeds per siliqua and thousands seed weight. The other yield contributing characters e.g. plant height, number of primary branches per plant, number of secondary branches per plant, number of siliqua per plant and siliqua length were recorded higher in BARI Sarisha-15 × SAU Sarisha-2 than the checks. The yield per plant was found higher in the genotype BARI Sarisha-15 × SAU Sarisha-2 than BARI Sarisha-15. The days to maturity, plant height and thousand seed weight were almost same in the genotype BARI Sarisha-15 × SAU Sarisha-3 and BARI Sarisha-15. The genotype BARI Sarisha-15 × SAU Sarisha-3 showed higher number of secondary branches per plant, number of siliqua per plant, siliqua length, number of seed per siliqua and yield per plant than popular variety BARI Sarisha-15. Thousand seed weight and yield per plant had high heritability along with high genetic advance in percent mean. The moderate heritability and high genetic advance in percent mean were recorded for number of secondary branches per plant and number of siliqua per plant indicating that the selection of these traits would be effective. The genotypes BARI Sarisha-15 × SAU Sarisha-3 and BARI Sarisha-15 × SAU Sarisha-2 were chosen as new plant type for their better performance in aspects of yield and yield contributing traits than the popular check varieties.
Key word: Brassica rapa, mean performance, heritability, genetic gain.
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