Agronomy journal, Vol. 73 No. 4-5, 2011.
Original scientific paper
ASSESSMENT OF GENETIC VARIATION AMONG ADVANCED LINES OF BRASSICA NAPUS L.
Khandker Shazia Afrin
; Agricultural University, Dhaka-1207, Bangladesh
Firoz Mahmud
; Agricultural University, Dhaka-1207, Bangladesh
Md. Shahidur Rahid Bhuiyan
; Agricultural University, Dhaka-1207, Bangladesh
Md. Abdur Rahim
; Agricultural University, Dhaka-1207, Bangladesh
Abstract
A field experiment was conducted with 22 Brassica napus L. advanced lines at the experimental farm of Sher-e-Bangla Agricultural University, Dhaka to study the genetic variation among advanced lines of Brassica napus L. during November 2008 to March 2009. The genotypes were significantly different for all the characters studied except for days to 80% maturity. The characters days to 80% maturity, plant height, number of primary branches per plant, number of seeds per siliqua, number of siliqua per plant and seed yield per plant showed higher influence of environment whereas, siliqua length and 1000-seed weight showed the least. Moreover, the number of primary branches per plant, number of secondary branches per plant, siliqua length, number of seeds per siliqua, number of siliqua per plant, 1000-seed weight and seed yield per plant showed moderate broad base heritability while plant height exhibited the highest heritability. The significant positive correlation with seed yield per plant was found in plant height, number of primary branches per plant and number of siliqua per plant. However, the highest significant positive correlation was found between days to 50% flowering and plant height. Path coefficient analysis showed that the plant height had maximum positive direct effect on seed yield followed by number of siliqua per plant and siliqua length. Plant height, number of primary branches per plant and number of siliqua per plant were the most important contributors to seed yield per plant which could be taken into consideration in future hybridization program.
Keywords
genetic variability; Brassica napus; correlation coefficient; path coefficient
Hrčak ID:
79939
URI
Publication date:
12.4.2012.
Visits: 2.068 *