Browsing by Author "Rahim, M. A."

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DETERMINATION OF THE POTENTIALITY OF DIFFERENT SESAME (Sesamum indicum L.)GENOTYPES
(Bangladesh Journal of Agriculture, 2024-07) Islam, M. N.; Sultana, S.; Harun-Ur-Rashid, M.; Rahim, M. A.
A field experiment was carried out in Randomized Complete Block Design (RCBD) with three replications at the experimental field of Sher-e-Bangla Agricultural University (SAU), Dhaka during the Kharif season of 2022 to examine the genetic variability, correlation, and path analysis based on 12 characters of 43 sesame genotypes. Analysis of variance exhibited significant differences among the genotypes for most of the characters except the number of capsules per plant. The phenotypic variance and phenotype coefficient of variation were relatively higher than the respective genotypic variance and genotypic coefficient of variation for all the characters. High broad sense heritability together with high genetic advance in percent of mean was observed for number of secondary branches per plant (90.1%), 1000-seed weight (99.3%), and seed yield per plant (97.9%) while moderate heritability for days to 50% flowering (59.8%). The correlation coefficient analysis revealed that seed yield per plant had a significant positive correlation with plant height, days to 50% flowering, days to 80% maturity, number of primary branches per plant, number of capsules per plant, number of seeds per capsule, height of the first capsule, and 1000-seed weight. It appears from path coefficient analysis that plant height (0.856), days to 80% maturity (0.227), number of primary branches per plant (0.467), number of secondary branches per plant (0.441), capsule length (0.258), and number of seeds per capsule (0.213) had a positive direct effect on the yield per plant whereas, internode length (-0.799) followed by number of capsules per plant (-0.370), and days to 50% flowering (-0.198) had a negative direct effect. Based on mean performance, heritability, and interrelationship, the genotypes G6, G12, and G36 for seed yield per plant, and the genotypes G26, G27, and G37 for early maturity could be selected for further varietal improvement of sesame.
EXPLICATING THE SALINITY TOLERANCE OF COWPEA (Vigna unguiculata L. Walp.) GENOTYPES AT SEED
(Bangladesh Journal of Agriculture, 2024-07-18) Rahim, M. A.; Hossain, A.; Ara, A. M; Islam, M. N.; Huda, K. M. K.
Cowpea is an important food and fodder legume in the arid and semi-arid tropics of the world. Soil salinity adversely affects seed germination, which ultimately reduces crop production. The present study was carried out to screen the cowpea germplasm and identify the salinity tolerant genotypes at the germination stage. Initially, an experiment with five salinity levels (0, 50, 100, 200, and 250 mM of NaCl) was conducted, and the results showed that 200 mM of NaCl concentration could be a sensible salinity stress to assess the salinity tolerance of cowpea genotypes. A total of 29 cowpea genotypes were evaluated under a 200 mM NaCl concentration. Four salinity tolerance indices such as absolute decrease (AD), inhibition index (II), relative salt tolerance (RST), and salt tolerance index (STI) were calculated from germination percentage without stress (GC) and germination with 200 mM NaCl (GS). All the indices showed significant variation in responses to salinity stress among the cowpea genotypes. The results revealed that salinity stress significantly reduced the germinating percentage in cowpea. Total seven cowpea genotypes (G4, G9, G12, G15, G26, G27, and G32) were found to be salinity tolerant lines at the germination stage. The seven genotypes were clustered in the same group which had the higher RST (G4: 0.58, G9: 0.80, G12: 0.50, G15: 0.60, G26: 0.50, G27: 0.60, and G32: 0.80) and STI (G4: 0.58, G9: 0.80, G12: 0.50, G15: 0.60, G26: 0.50, G27: 0.60, and G32: 0.79) under salinity stress. However, this is a preliminary screening against salinity at the germination stage, and further research is required at the seedling vegetative and reproductive stages for validation.
Kamalapur : 2005--2007 census results / edited by Carol van Mels and M A Rahim
(Dhaka: ICDDR,B, 2008, 2008) Lindeboom, Wietze; van Mels, Carel; Rahim, M. A.