Asian Science Citation Index is committed to provide an authoritative, trusted and significant information by the coverage of the most important and influential journals to meet the needs of the global scientific community.  
ASCI Database
308-Lasani Town,
Sargodha Road,
Faisalabad, Pakistan
Fax: +92-41-8815544
Contact Via Web
Suggest a Journal
 
Articles by Muhammad Zaffar Iqbal
Total Records ( 8 ) for Muhammad Zaffar Iqbal
  Ghayour Ahmad , Saeed Ahmad Malik , Zahid Mamood , Muhammad Zaffar Iqbal , Saghir Ahmad and Saeed Ahmad
  Three local as well as exotic leaf curl virus susceptible lines/cultivars of cotton, i.e., S-12, Acala-1517-C and CIM-70 were evaluated for yield, yield components and fibre traits. This disease had adverse effect on morphological, yield and yield components and fibre quality of all varieties. The cv. CIM-70 exhibited the highest reduction (87.3 %) in seed cotton yield and staple length (7.1 %) due to cotton leaf curl virus disease. The extent of adverse effects of this disease was most prominent on ginning out-turn (-18.2 %) and fibre fineness (23.8 %) of S-12.
  Saghir Ahmad , Noor-ul-Islam Khan , Muhammad Zaffar Iqbal , Altaf Hussain and Mahmudul Hassan
  Salinity is a big threat to world agriculture. It imposes a major setback in increasing the yield of cotton. This crop is very sensitive to salinity at germination and seedling stage. Salt stress adversely affects the biomass production, i.e., decrease in leaf area, stem thickness, shoot and root weight and ultimately brings about decrease in seed cotton yield. A threshold salinity level at which initial yield of cotton declines is 7.7 dS m-1 with a 50% reduction in yield at 17.0 dS m-1. Reduction in fibre length, fibre strength and micronaire values, whereas an increase in ginning out-turn have been reported under saline conditions in both Gossypium hirsutum and Gossypium barbadense. High salinity level adverse affects photosynthesis. Research studies indicate decrease in nitrogen of leaf cotton with increasing salinity levels. Salinity increases Na+ and Cl¯ and decreases K+, Ca2+ and Mg2+ in leaves of cotton. Slight increase in K+ and modest accumulation of Na+ with increase in salinity have also been found in literature. K+/Na+ ratio has been used as a successful selection criterion for salt tolerance in some crops. Generally salt tolerance in cotton has been associated with Na+ exclusion. High salinity reduces N and P uptake in cotton, whereas low salinity does not have a significant effect on the absorption of either of the ions.
  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.
  Saghir Ahmad , Muhammad Zaffar Iqbal , Saeed Ahmad , Muhammad Attique Sadiq and Noor-ul-Islam Khan
  Inheritance pattern of sympodia per plant, plant height, bolls per plant, seed cotton yield and seed oil content of cotton was assessed using diallel crossing model in which six genotypes B-557, Culture 728-4, MNH156, B-1850 (ne), Culture-604-4 and MNH147 were crossed in all possible combinations. The results from scaling tests for the adequacy of additive-dominance model indicated that sympodia per plant, plant height, bolls per plant, seed cotton yield and seed oil content were partially adequate for further genetic analysis. Sympodia per plant, plant height, bolls per plant and seed cotton yield and were controlled by additive genes, whereas over-dominance was prevalent in seed oil content characteristics. Narrow sense heritability for plant height, bolls per plant and seed cotton yield suggested that these parameters could effectively be improved through selection in the early segregating generations.
  Saghir Ahmad , Muhammad Zaffar Iqbal , Altaf Hussain , Muhammad Attique Sadiq and Abdul Jabbar
  Mode of gene action and heritability were estimated for ginning out-turn, staple length, fibre maturity, fibre fineness, fibre strength and yield of cotton. Six genotypes B-557, Culture 728-4, MNH156, B-1850 (ne), Culture-604-4 and MNH147 were crossed in all possible combinations in diallel fashion. The results from scaling tests for the adequacy of additive-dominance model indicated that ginning out-turn, fibre fineness and fibre strength were found full adequate, whereas staple length, fibre maturity and seed cotton yield were partially adequate for further genetic analysis. Ginning out-turn, fibre fineness, fibre strength and yield were controlled by additive genes, whereas over-dominance was prevalent in staple length and fibre maturity. High narrow sense heritability for ginning out-turn and fibre strength suggested that these parameters could effectively be improved through selection in the early segregating generations, whereas chances of improvement for fibre fineness and seed cotton yield would be moderate as heritability estimates for these parameters were medium (h2 NS = 0.608 and 0.702%, respectively but poor for staple length.
  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.
  Muhammad Zaffar Iqbal and Sultan Ahmad Khan
  Line X tester analysis, involving five lines and three testers were made in potato for five parameters. The variances due to GCA and SCA showed that the gene action was predominantly additive for stem height and stem plant-1 whereas preponderance of non-additive genetic effect was advocated for dry matter content percentage and specific gravity. Both additive and non-additive generic interaction was important for yield of potatoes. The line Diamant was best general combiner for the characters like stem plant-1 and yield of potatoes ha-1 whereas line Bartina was the best general combiner for main stem height and specific gravity. However Desiree proved to be the best general combiner as far as dry matter content is concerned. The tester Cardinal proved the best general combiner for all the characters under study. The specific combining ability effects were the highest in the cross Hydra X Cardinal for stem height. Whereas, for stems plant-1 and dry matter content percentage, the cross Bartina X Cardinal surpassed rest of the crosses. The cross Diamant X Kondor manifested the excellent specific combining ability value for yield of potato ha-1. The best general combining ability parent when utilized in cross combinations as one of the parents produced good combinations in main stem height, number of stem Plant-1, dry matter content and yield of potatoes ha-1. This suggests additive X additive or additive X dominance gene interaction for these traits. The cross Hydra and Multa gave the best SCA effect for specific gravity having both the parents with low GCA effect hence suggested non-additive i.e., dominance and epastatic type of gene action for this character. Recurrent selection with progeny testing is contemplated for improving the tuber yield in potato.
  Muhammad Iqbal , Muhammad Zaffar Iqbal , Muhammad Ali Chang and Khezir Hayat
  Exploiting heterosis is one method to increase cotton yield that has stagnated in recent years. One primarily to difficulty of producing F1 seed, use of heterosis in cotton (Gossypium hirsutum L.) has been limited. The objective of this study was to evaluate the potential of using F2 hybrids by comparing them with parents, commercial variety and F1,S for yield, yield components and fiber quality. The second objective of this study was to determine if parental research organization of origin was related to mid parent and useful heterosis. The genetic design was a half diallel consisting of six parent (evolved by different research organization), 15 F1,s and 15 F2,s. The 36 genotypes were grown in 2002-2003. Yield, yield components fiber length, strength and micronaire reading were determined. The highest yielding parent was FH-901 (3517 kg ha-1) with good yield components (recommended commercial variety for general cultivation), while the variety Reshmi had best quality traits among these parents. The cross combinations MNH439 X CIM-448, FH-901 X CIM-448 and NIAB-78 xX CIM-448 showed minimum inbreeding depression (-34.6, -20.0 and -21.8%, respectively) for seed cotton yield. These crosses also showed less inbreeding depression for yield components and fiber traits than expected inbreeding depression i.e 50.0%. General combining ability mean squares were significant for all traits and specific combining ability mean squares were also significant for all traits except boll weight and fiber strength. The GCA effects were higher than SCA effects for all traits, which indicated that additive gene action is prevailing with dominant for expression of these traits. The variety CIM448 was the best general combiner for the yield and yield components.
 
 
 
Copyright   |   Desclaimer   |    Privacy Policy   |   Browsers   |   Accessibility