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Articles by Abdul Karim
Total Records ( 5 ) for Abdul Karim
  Saeed Ahmad , Taj Muhammad , Abdul Karim , Abdul Jabbar and Ghayour Ahmad
  Four varieties of onion viz; Phulkara Dark Red, Desi and Rubina were evaluated to see the effect of pollinator and insecticides on seed setting. Reduced or limited visiting of pollinators caused substantial reduction in seed production of onion showing 50 to 61% seed setting with non significant difference among the varieties. However significant differences were observed among varieties for number of flowers per umbel, number of fertilized flowers per umbel, umbel weight and seed weight per umbel. This reduction in seed production could be due to pesticides application of side grown crops (sunflower, brassica and coriander etc.).
  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.
  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.
  Saeed Ahmad , Taj Muhammad , Abdul Karim , Abdul Jabbar and Ghayour Ahmad
  Four varieties of Onion viz., Phulkara, Dark Red, Desi and Rubina were evaluated to see the effect of pollinator on seed setting. Reduced or limited visiting of pollinators caused substantial reduction in seed production of onion showing 50 to 61% seed setting with non significant differences among the varieties. However, significant differences were observed among varieties for number of flowers, fertilized flowers, seed weight per umbel and umbel weight. This reduction in seed production could be due to pesticides application or attraction of side grown crops (Sunflower, Brassica and Coriander etc.)
  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.
 
 
 
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