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Articles by Mahmood-ul-Hassan
Total Records ( 8 ) for Mahmood-ul-Hassan
  Saifullah Ajmal and Mahmood-ul-Hassan
  Study regarding correlation and path coefficient in 20 local and exotic genotypes of mungbean (Vigna radiata L.) were undertaken to establish important traits contributing towards grain yield. Observation were taken on plant height, days to flowering, number of branches per plant, number of pods per plant, number of seeds per pod, 100-grains weight, biological yield per plant, harvest index and grain yield per plant. The results indicated that all the characters under study were positively associated with grain yield. Number of pods per plant, number of seeds per pod, biological yield per plant and harvest index showed highly significant association with grain yield, while correlation between number of branches per plant and grain yield was significant. Harvest index had maximum direct effect on grain yield followed by biological yield per plant. Direct effects of number of branches per plant, number of pods per plant and number of seeds per pod on grain yield were very small but greater indirect effects via harvest index and biological yield resulted in highly significant correlation with grain yield. Biological yield and harvest index may be exploited in selecting high yielding cultivars in mungbean.
  Mahmood-ul-Hassan , Taj Muhammad , Saeed Ahmad , Muhammad Iqbal , Abdul Karim and Muhammad Yousaf Akhtar
  To explore N- use efficiency of MNH554 a tetraploid cotton (Gossvpium hirsutum L.) in relation to various irrigation regimes, a three year project was launched in 1998 under agro-ecological conditions prevailing at Multan. The experiment was seeded in the open field during the normal growing season, with pure and true to type seed of variety MNH554. Four nitrogen doses and three irrigations regimes were applied to the crop. In addition, the crop had also received 56 kg P ha-1 and 55 kg K ha-1 as a basal dose. Growth and development characteristics comprising of height of the plant, number of mature bolls per plant, boll weight, yield of seed cotton and ginning outturn were studied. Plant height, bolls per plant, boll weight and yield of seed cotton registered a positive and significant response to increasing doses of nitrogen and irrigation. On an average of three years, the maximum yield of 4105 kg ha-1 of seed cotton was obtained by 168 kg N ha-1 with seven irrigations, well distributed throughout the growth and development period. Nitrogen and irrigation application did not improve the ginning outturn, rather it ensued a slight drop.
  Mahmood-ul-Hassan , Taj Muhammad , Muhammad Nasrullah , Muhammad Iqbal , Abdul Nasir and Inamul-Haq
  To investigate the effect of split application of nitrogen on cotton yield and its components for medium stapled commercial cotton (Gossypium hirsutum L.) variety MNH554, a field trial was carried out at Cotton Research Station, Multan during 1998 to 2000. Ten nitrogen levels viz., 0, 56, 84, 112, 112, 140, 168, 168, 196 and 224 kg N ha-1 were tested in Randomized Complete Block Design having three replications. Nitrogen was applied in split doses at planting. Ist irrigation, flowering and boll fermentation. 56 kg P2O2 ha-1 was also applied as a basal dose . N168 kg ha-1 proved superior over others when split applied in three equal doses i.e., 56, 56, 56 kg N ha-1 at Ist irrigation, flowering and boll formation stages. This produced a significant increase in plant height, bolls per plant, boll weight and seed cotton yield. On the average of three years 168 kg N ha-1 gave 212.8% increase in seed cotton yield over O.N.
  Mahmood-ul-Hassan , Muhammad Nasrullah , Muhammad Zaffar Iqbal , Taj Muhammad , Muhammad Iqbal and Saghir Ahmad
  An experiment was conducted to assess the effect of sowing date on two cotton varieties MNH552 and MNH554 grown on Ist April, 15th April, Ist. May, 15th May, Ist. June, 15th June, Ist. July and 15th July during 1998 and 1999 under Multan conditions. 15th May and Ist June sown cotton displayed significantly maximum seed cotton yield of 2998 and 2883 kg ha-1 in 1998 and 4027 and 3894 kg ha-1 respectively in 1999 as compared to 595 and 253 kg ha-1 (1998) and 1269 and 223 kg ha-1 (1999) from crop sown on Ist and 15th July respectively. The increase in both sowing dates in seed cotton yield was associated with boll weight and bolls per plant. On average of two years data 15th May produced highest seed cotton yield of 3513 kg ha-1, whereas the lowest figure was 238 kg ha-1 (15th July). Comparing varietal performance MNH552 (2310 kg ha-1) yielded higher as compared to MNH554 (2288 kg ha-1). However two cultivars declined the yield in late planting.
  Saeed Ahmad , Abdul Karim , Abdul Jabbar , Mahmood-ul-Hassan , Taj Muhammad and Muhammad Iqbal
  A wide range of average performance and genetic variability was estimated for F1 crosses of nine commercial varieties of cotton viz., CIM443, MNH147, FH-682, N. Krishma, SLS-1, CIM-446, CIM448, FVH-53 and MNH552 for bolls and seed cotton yield per plant, boll weight, staple length, ginning out turn (%) and virus infestation (%). The highest genotypic variability was recorded for virus infestation (94.61%) followed by bolls per plant (29.84%). The highest estimates of heritability associated with highest genetic advance for bolls per plant (97.8 and 60.78), virus infestation % (95.0 and 189.9) and boll weight (97.39 and 10.99) suggested selection for improvement of these traits due to presence of sufficient genotypic variability. However, low estimates of these parameters for staple length showed slow progress through selection.
  Muhammad Iqbal , 1Muhammad Ali Chang , Muhammad Zaffar Iqbal , Mahmood-ul-Hassan , Abdul Karim and Saghir Ahmad
  Six upland cotton (G. hirsutum L.) varieties were crossed in all possible combinations. The parents and F1 were sown in a replicated experiment. Hayman’s diallel cross analysis was employed to investigate the nature of gene action involved in the inheritance of number of sympodial branches per plant, number of bolls per plant, boll weight, yield, ginning out turn %, staple length, fiber fineness and fiber strength. The diallel analysis revealed that all the characters were polygenically inherited and exhibited partial dominance with additive gene action. The estimation of component of variation for these characters suggested that the (D) additive component was significant in all the traits under study and was lower than dominant components (H1 and H2) of variation except for number of sympodial branches per plant, number of bolls per plant and seed cotton yield per plant, where the dominant components were higher in magnitude than additive. The positive estimate of F indicated that dominant genes were in excess than recessive genes in the parents for all the traits except for ginning out turn percentage and fiber fineness. The ratio of H2/4H1 indicated largely asymmetry of positive and negative genes in parents for number of bolls per plant, seed cotton yield, staple length, fiber fineness and fiber strength, and symmetrical distribution of positive and negative genes in the parents was observed for number of sympodial branches per plant, boll weight and ginning out turn percentage. The h2 value for number of number of sympodial branches per plant, number of bolls per plant, boll weight, seed cotton yield per plant, ginning out turn, staple length, fiber fineness, and fiber strength was positive and significant which indicated that hetrotic breeding was rewarding for these traits. The correlation between Wr + Vr and Yi indicated that dominant genes are mainly responsible for the expression of all traits. Mass selection will be an effective method for improving the boll weight and reciprocal recurrent selection method will be helpful for improving the sympodial branches per plant, number of bolls per plant, seed cotton yield, fiber fineness and fiber strength. The full sib or half sib family selection, pedigree and progeny test would probably be necessary to achieve the genetic progress for GOT% and staple length.
  Bi. Fatima , Syed Asghar Ali , Seema Iqbal , Muhammad Arman and Mahmood-ul-Hassan
  The effect of newly developed fertilizer named Fertilizer fritz (composed of Fe, Cu, Mn, Zn and B) on the growth responses, yield and uptake of micronutrients in the three medicinal plants Coriandrum sativum (Coriander), Nigella sativa (Kalonji) and Ptychotis ajowan (ajwain desi) were studied. Experiments were conducted in the fields of PCSIR Laboratories Complex, Karachi during October 1999 to May 2000 in randomized complete block design with three replications. The analysis of the data revealed that the formulation had a significant effect on plant height, length of leaves, yields of total plant, seeds, roots and stem. Maximum plant height was recorded in C. sativum (80%). Increases in the yield of plant material were about 45-95% in C. sativum, 25-60% in N. sativa and 5-40% in P. ajowan. Increases in the oil contents were 11.0, 8.80 and 7.60% for C. sativum, N. sativa and P. ajowan, respectively over control. In general plant responses towards the new formulation were in the order C. sativum>N. sativa>P. ajowan.
  Fatima Bi , Muhammad Arman , Mahmood-ul-Hassan and Seema Iqbal
  Physical and chemical analysis of the polysaccharides isolated from Hypnea musciformis (red algae) of Karachi coast showed the characteristics of k-carrageenan. The observed yield for the isolated carrageenan was about 36%. Optical rotation and sulphated ash contents were found as [α]D = 52o and 16.20%, respectively. FTIR spectra showed a characteristic band at 930 cmG1 represents the anhydrogalactose where as the band at 840 cmG1 represent the galactose-4-sulphate. Viscosity measurements revealed a linear relationship with increase in concentration and decreased with the rise in temperature of aqueous solution of carrageenan. Thermodynamic parameters such as activation energy, latent heat of vaporization, free energy change of activation and entropy change of activation was evaluated by the change in viscosity data as a function of temperature and concentration. The free energy change of activation (ΔSη) increased regularly as the concentration of aqueous carrageenan solution and temperature of the system increased. Higher values of free energy change of activation, showed the higher association of carrageenan with water at particular temperature. The values of entropy change of activation (ΔSη) of viscous flow also increased with the increase in concentration and temperature of carrageenan solution. The high negative values of entropy change of activation (ΔSη) showed that the solution of carrageenan was more ordered in initial state than the activated one.
 
 
 
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