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Articles by Muhammad Ahsan
Total Records ( 8 ) for Muhammad Ahsan
  Syed Sadaqat Mehdi , Nadeem Ahmad and Muhammad Ahsan
  Highly significant differences were found among S1 maize families and treatments for all indicated traits except dry root weight which was non- significant among treatments. Treatments × S1 families interaction was found significant for fresh shoot weight, dry shoot weight and fresh shoot length. The values of coefficient of variation for fresh shoot weight was found to higher than fresh root weight, dry root weight and dry shoot weight. Broad-sense heritability estimates were ranging between 54.27-83.99 percent for indicated seedling traits. Positive and linear inter-relationships were found among all indicated traits. It is therefore suggested on the basis of broad-sense heritability, coefficient of variation estimates and positive linear relationships that dry root weight may be more useful selection criteria, while selecting for superior S1 maize families for water stress conditions.
  Syed Sadaqat Mehdi and Muhammad Ahsan
  The experiment was carried out to evaluate the best one hundred S2 families for green fodder yield and other plant traits to select superior families for further inter-crossing. The S1 families were found different for green fodder yield per plant and number of leaves per plant. The values of coefficients of variation were found to be high for green fodder weight per plant (18.34%). These results indicate that there was more variability among S2 lines for green fodder weight per plant. Green fodder weight was positively and highly significantly correlated with number of leaves per plant and plant height. However, it is concluded from the results that green fodder weight can be used as selection criteria while selecting superior S1 maize families.
  Syed Sadaqat Mehdi , Muhammad Ahsan and Iftikhar Ahmad Khan
  There was significant variability found for plant height and green fodder yield among forty-eight genotypes of Lucerne. Moderate coefficients of variation and high heritability estimates for plant height and green fodder yield among the Lucerne genotypes suggested that a greater improvement is possible by hybridizing groups-I (Beaver, E-542 genotypes), group-II (GR 793, Russian #36, 75-527) and group-III (African Pop, GR 692, Griamn-2, Hunter River) which may produce better segregants for increased green fodder yield.
  Syed Sadaqat Mehdi and Muhammad Ahsan
  Five hundred S1 families were evaluated in the greenhouse for seedling traits in C1 recurrent selection cycle. Higher values of GCV% were toand for fresh shoot and dry root weight (28.85 and 41.95 respectively). Moderate broad-sense rieritahility (h2BS) estimates were found for fresh shoot weight, dry root weight and fresh shoot length (42.45, 48.94 and 55.0 respectively). Fresh shoot weight was phenotypically, highly significantly and positively correlated with other indicated traits. Hign values of coefficients of variation, positive highly significant inter-relationships, moderate broad-sense heritability (h2BS) estimates and relative expected genetic advance (REΔg %) was also found greater for fresh shoot weight and dry root weight. It is generally concluded from the results that fresh shoot weight can be used as selection criteria while comparing S1 families at seedling stage in maize as it is easy to determine as compared to dry root weight.
  Muhammad Ahsan , Syed Sadaqat Mehdi and Ihsan Khaliq
  The development of pure lines of maize by the application of tissue culture is considered to be more effective to enhance high yielding hybrids development. Somaclonal variations may be more useful for genetic material exchange in wide hybrids. Disease-free superior clones can be regenerated through tissue culture techniques, which can be applied to all known infectious agents but are especially valuable in elimination viruses and viroids from vegetatively propagated crops. Producing clean planting material through in vitro methods can significantly raise crop yield and quality. A synthetic medium is more useful than the natural products in the medium for the callus induction and growth. As the process of regeneration may be enhanced by adding synthetic plant hormones (auxins and cytokinines) which regulate cell division and differentiation.
  Muhammad Shahid Munir Chohan , Muhammad Saleem , Muhammad Ahsan and Muhammad Asghar
  Fifty inbred lines of Zea mays L. were screened against water stress in glass house experiment. Six inbred lines selected on the basis of various tolerance levels at seedling stage were hybridized in a diallel mating system. The F1 hybrids along with the parents were evaluated in field under normal and water stress regimes to determine the nature and magnitude of genetic variances and heritability estimates. Highly significant (p<0.01) differences were noted among the genotypes for all the traits studied under both regimes. The scaling test disclosed full adequacy for traits like plant height, ear leaf area, grain yield, Cell Membrane Thermostability (CMT) and net Photosynthetic rate (Pn) under normal condition. Similarly characters like ear leaf area, 100-grain weight, cell membrane thermostability and net photosynthetic rate under water stress condition showed additive genetic effect with partial dominance which suggested that these traits might be useful during selection for developing synthetics. The model was partially adequate for anthesis-silking interval and 100-grain weight under normal condition and plant height, anthesis-silking interval and grain yield under moisture deficit condition. Moderate to high heritability estimates for grain yield and yield related parameters revealed maximum ability to transfer the genes to the next generation.
  Fahad Masoud Wattoo , Muhammad Saleem , Muhammad Ahsan and Shahzad M.A. Basra
  Fifty inbred lines of maize acquired from various sources, were screened in the warehouse for seedling traits under both normal and water deficit conditions and six diverse inbred lines were selected. The selected inbred lines were sown in the field for making all possible crosses in diallel mating fashion. The F1 crosses and their reciprocals along with the parents were sown in the field under both regimes using a replicated Randomized Complete Block Design. Data for various agro-physiological traits were recorded at different growth stages of the crop and then subjected to statistical analysis. Significant genetic variability existed for most of the traits under normal and moisture deficit conditions. The results for scaling tests showed fully adequate for the traits like 100-kernel weight, grain yield per plant, cell membrane thermostability, stomatal conductance and canopy temperature under normal condition while plant height, 100-kernel weight, grain yield per plant, leaf temperature and canopy temperature depression under water stress condition. The data were partially adequate for the traits like anthesis-silking interval, cell membrane thermostability and stomatal conductance under moisture deficit condition. All traits exhibited additive gene action under both regimes. Heritability estimates for yield related traits revealed maximum ability to transfer the desirable genes to the next generation.
  Sumeria Nazir , Adnan Younis , Atif Riaz , Ahsan Akram , Nasir Ahmad Khan , Usman Tariq , M. Nadeem , M. Kaleem Naseem and Muhammad Ahsan
  Background and Objective: Ravenea palm (Ravenea rivularis) is the most popular grown interior potted plant. Present study was carried out to assess the effect of different potting substrates in various compositions on growth and development of Ravenea plants. Materials and Methods: In total, ten treatment combinations were used to compare with control treatment (garden soil) and treatment was consisted of 16 plants with four replications. Various potting substrates: Garden soil, silt, farmyard manure, peat moss, leaf compost and coconut compost in various combinations were added. The experiment was carried out in Completely Randomized Design (CRD). The collected data for plant growth and development were subjected to Duncan’s Multiple Range (DMR) test whereas for chemical and physical characteristics of potting substrate and means was compared. Results: The results depicted that the T10 that is the combination of farmyard manure, silt, coconut compost, peat moss and leaf compost (1:1:1:1:1) exhibited best results for the growth and production of potted Ravenea plants. The treatment T10 substrate is considered excellent due to its density, saturation percentage, structure, texture, consistency and Organic Matter (OM) as well as nitrogen, phosphorus and potassium concentration. Conclusion: It can be concluded that to get quality pot production a mixture of substrates proved to be best as it delivers a combination of properties and nutrients. The new potting mix will provide a stable, organic, sustainable, environmental friendly and cost effective alternatives to nurserymen.
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