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Articles by Hidayat-ur-Rahman
Total Records ( 5 ) for Hidayat-ur-Rahman
  Muhammad Younas , Hidayat-ur-Rahman and Ghulam Hayder
  The study was undertaken to evaluate the maize hybrids for yield and yield associated traits. Results indicated that hybrids were significantly different from one another for all the characters. Among the twelve hybrids, the maximum days to 50 % silking (62.50), days to 50 % pollen shedding (62.50) were recorded in hybrid 3043, while the lowest mid-silking days of 54 and mid-pollen shedding days of 55 were recorded in Pop 9815. The highest values of plant and ear height were recorded in hybrid 3012. On the other hand lowest plant height was recorded in Pop - 9815, lowest ear height was observed in Baber hybrid. Maximum ear length of 20.46 cm was observed in hybrid 3130, while minimum ear length of 16.75 cm was recorded for hybrid Super Early. Maximum kernel rows per ear i.e. 15 rows was obtained for Pop-9815, while minimum (12.30) kernel rows was recorded for hybrid 3062. Maximum 1000-kernels weight of 395.16 g was observed in hybrid Ghauri, while minimum 1000-kernels wt of 261.18 g was recorded for hybrid 3057. Maximum grain yield (9915.66 kg ha-1) was obtained from hybrid C-919, while minimum (6845.74 kg ha-1) grain yield was recorded for the hybrid 3043. Results suggest that these hybrids, could be used as source of improved germplasm for developing maize genotypes with superior attributes.
  Saira Pervaiz , Ghulam Mustafa Sajid , Rashid Anwer and Hidayat-ur-Rahman
  Two sugarcane (Saccharum Officinarum L) varieties namely, Katha and BL4 were used in this study in order to compare their response for culture establishment, shoot proliferation, root induction and growth retardation. Shoot number, mass and length were the growth parameters measured. Genotype dependent response was found against different growth conditions such as growth media composition and growth regulators. Liquid Murashige-Skoog (MS) media was found to be more suitable for culture proliferation as compared to the solid media of the same composition, suggesting a positive and favorable effect of aeration and homogenization on culture performance. A better organogenesis response i.e. maximum shoot length, shoot mass and shoot number was observed when explants were cultured on the media containing 4.4 μM BAP for both the varieties but BL4 appeared to be more responsive genotype to shoot proliferation as compared to katha at any given level of growth regulator. Growth retardation was best achieved on the media containing 4 g L -1 mannitol among the concentrations used and degree of growth retardation was also found to be genotype dependent. There was a linear relationship between degree of growth retardation and concentration of the osmotica used. Root induction response (root number and root length) was the highest in katha cultures grown on half strength MS media containing 1.9 μM Indole butyric acid among the auxins, Indol butyric acid, indole acetic acid and naphthalene acetic acid, that were used in this study.
  Sardar Ali , Hidayat-ur-Rahman , Raziuddin , S. Salim Shah and G. Hassan
  Broad sense heritability estimates, genetic advance and Relative Expected Genetic Advance (REGA) were computed for different fodder yield related traits in two maize populations during Kharif 2002 and 2003. Two maize populations, DRS; developed through recurrent selection and DMS developed through mass selection, were grown in modified RCBD with two replications. Mean squares from the analysis of variance among S1 families for both maize populations indicated highly significant (p≤0.01) differences for all the studied traits. Estimates of genetic variances were significant for all traits except stem girth in both populations. Genetic variances in comparison to respective environmental variances were greater for majority of the traits in both populations. Heritability estimates were high and significant for all the traits in both populations. Comparison of two populations revealed that heritability estimates were higher for internode length and fresh fodder yield in the DRS population and for plant height, stem girth, flag leaf area and dry matter content in the DMS population. Genetic advance was higher for internode length, flag leaf area, fresh fodder yield in the DRS population and for plant height, stem girth and dry matter content in DMS population. REGA% was higher for internode length and fresh fodder yield in DRS population while DMS population attained higher values for plant height, stem girth, flag leaf area and dry matter content. The higher heritability estimates, genetic advance and REGA for fresh fodder yield in DRS population indicates that recurrent selection method was comparatively more effective in improving maize population for fodder yield parameters.
  Sardar Ali , Hidayat-ur-Rahman , Raziuddin and S. Salim Shah
  This study was conducted during the years 2002-2003 at the Research Farm of NWFP Agricultural University, Peshawar (Pakistan) to compare selected maize populations for fodder parameters. Two maize populations, one developed through recurrent selection (DRS) and the other through mass selection (DMS), each comprising of 125 S1 families were tested in modified Randomized Complete Block Design (RCBD) with two replications. Six fodder related traits viz., plant height, internode length, stem girth, flag leaf area, dry matter content and fresh fodder yield were determined. Mean squares from the analysis of variance among S1 families for both maize populations indicated highly significant (p≤0.01) differences for all the parameters. Data ranged from 58.7-201.9 and 60.8-184.1 cm for plant height, 6.6-16.3 to 13.0-18.5 cm for internode length, 0.7-2.0 to 0.7-1.6 cm for stem girth, 9.7-177.2 to 9.0-120.0 for flag leaf area, 124.0-680.0 to 182.0-652.0 g kg-1 for dry matter content and 600.0-6720.0 to 360.0-5040.0 kg ha-1 for fresh fodder yield in DRS and DMS population, respectively. The mean values were 124.5 and 134.5 cm for plant height, 11.9 and 12.6 cm for internode length, 1.0 and 1.1 cm for stem girth, 52.1 and 43.8 cm2 for flag leaf area, 354.2 and 392.8 g kg-1 for dry matter content and 2167.9 and 2166.2 kg ha-1 for fresh fodder yield in DRS and DMS population, respectively. Coefficient of variation was comparatively smaller (less than 10%) for plant height, internode length and stem girth in the DRS population and plant height, internode length, stem girth and dry matter content in the DMS population. The wider range among S1 families of both populations depicts the existence of sufficient variation for these traits which can, therefore be exploited in maize breeding programs aimed at improving fodder characteristics.
  S. Salim Shah , Hidayat-Ur-Rahman , Iftikhar Hussain Khalil and Muhammad Iqbal
  Leaf blight of maize (Zea mays L.), caused by Bipolaris maydis (Nisik. and Miyake), is one of the major factors limiting maize production in the plain areas of Pakistan, particularly in the North West Frontier Province (NWFP). The objectives of this study were to estimate selection differential, expected and observed response to selection and heritability for maydis leaf blight resistance and grain yield and to determine progress from selection in a maize population. Two cycles of S1 recurrent selection were conducted in broad based maize population, Sarhad White (SW). One hundred S1 lines were compared with their respective original population (C0) as a check. The experimental material was evaluated under artificial epiphytotics during 2003 and 2004, at NWFP Agricultural University, Peshawar. Selection differentials, expected responses and heritability estimates were determined from the replicated S1 lines performance of the first cycle. The observed progress was estimated from the replicated S1 lines of the second cycle that were generated after recombination of selected S1 lines of the first cycle. Highly significant variations between the cycles were observed for MLB and grain yield. Moderate and high heritability estimates, desirable selection differentials and close correspondence of expected and observed response were manifested for MLB and grain yield. The positive percent deviation of inoculated from uninoculated trials in both cycles (C1 = 71% and C2 = 41%) for leaf blight indicated successful development of blight disease after artificial inoculation, while the negative percent deviation of inoculated form uninoculated trials (C1 = -21 and C2 = -6%) for grain yield indicated the impact of blight disease on grain yield. Blight disease was significantly reduced from 2.9 to 2.3, whereas, grain yield was significantly increased from 2041 kg ha-1 cycle-1 to 2527 kg ha-1 cycle-1 or 19% cycle-1. This yield improvement in SW was probably the result of concomitant reduction in the blight disease severity by -26%. These findings suggested that S1 recurrent selection was quite effective in improving disease resistance and grain yield. Nevertheless, some additional cycles of selection may be required to further improving grain yield and resistance level to maydis leaf blight in SW maize population.
 
 
 
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