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Articles by Khezir Hayat
Total Records ( 6 ) for Khezir Hayat
  Muhammad Iqbal , M. Zafar Iqbal , Rao Sohail Ahmad Khan and Khezir Hayat
  A trial was conducted at Cotton Research Station, Multan for three years (2001 to 2003) to compare developmental characteristics, quality traits, yield and its components among thirty two obsolete and modern varieties of Upland cotton (Gossypium hirsutum L). To verify the experimental results, historical data (1986 to 2003) of seed cotton yield, GOT and Staple length of top three high yielding lines was collected from National Coordinated Varietal Trials (NCVT) conducted in Multan region. Significant differences among varieties for node of first fruiting branch, monopodial branches per plant, days taken to first flower and ginning out turn percentage were exhibited. NCVT data showed that among varieties recommended for general cultivation since 1986, variety S-12 showed highest seed cotton yield and ginning outturn (40.5%). The cultivar CIM499 has highest staple length (29.8 mm). From the study, it was concluded that cotton breeders have improved earliness (node of first fruiting branch, monopodial branches per plant, days taken to first flower), lint percentage but improvement in seed cotton yield, yield components and staple length is still needed.
  Muhammad Iqbal , Nazia Nisar , Rao Sohail Ahmed Khan and Khezir Hayat
  The objective of this study was to observe water stress tolerance in cotton seeds, when mepiquat chloride is used as seed treatment. Increasing drought resistance of cotton seedlings by accelerating root growth is an important practical implication. The study was conducted on effects of mepiquat chloride (1, 1-dimetheyl peperidinum chloride) on drought resistance of cotton seedling. The cotton seeds were soaked for night in mepequat chloride solution i.e. 0, 500, 1000, 1500 and 2000 ml L- 1. Water stress was given after thirty days after sowing, for nine days and data were collected for root length, shoot length, fresh weight and dry weight. Firstly, mepiquat chloride seed treated plants were well irrigated and subjected to severe stress. It indicated that petiol length and shoot length decreased, while root length, fresh weight and dry weight increased with high concentration of mepiquat chloride. Cotton seeds treated with high dose of mepiquat chloride may elongate the days taken to emerge first true leaves. With the withdrawal irrigation, mepiquat chloride treated seedlings at all concentration maintained higher root growth, shorter stem length more fresh and dry weight than non-treated seedlings.
  Muhammad Iqbal , Khezir Hayat , Rao Sohail Ahmad Khan , Attiq Sadiq and Noor-ul-Islam
  The objective of this study was to get information about a character that is useful for selection in segregating generations for improving seed cotton yield. The present study was conducted to determine correlation and path coefficient analysis of earliness and yield components of upland cotton. The results showed that node of first fruiting branch, monopodial branches/ Plant, boll number and boll weight was positively and significantly correlated with yield in present genetic material understudy. Similarly path coefficient analysis revealed that node of first fruiting branch, monopodial branches/ Plant, boll number and boll weight had maximum direct positive effect on seed cotton yield, whereas the traits ginning out turn percentage (GOT%) and staple length had the direct negative effect on seed cotton yield. The results indicated that for evolving a superior genotype possessing all the three basic characteristics i.e., earliness, high yield and improved fiber quality of international standard, breeder had to use reciprocal recurrent selection method or modified back cross or three- way cross within genetic material under study. The result of present study indicated that for evolving a superior genotype possessing earliness, high yield, breeder should focus on improving no. of bolls and boll weight with lower no. of monopodial branches and node of first fruiting branch.
  Muhammad Iqbal , Noor-ul-Islam , Khezir Hayat and Taj Muhammad
  The objective of this study was to compare yield, yield components and fiber traits of different genotypes/varieties under different plant spacings and nitrogen fertilizer levels. Field experiment was conducted during 2006-2007 to evaluate the effect of genotype, plant spacing and nitrogen fertilizer on cotton. Five genotypes (MNH-786, MNH-789, MNH-6070, CIM-496 and BH-160), three plant spacings (15, 30 and 45 cm) and three nitrogen fertilizer levels (6.5, 8.6 and 11 bags of urea ha-1) were studied. Results showed that significant differences exit for plant height, no. of bolls m-2, seed cotton yield kg ha-1 due to genotypes, interaction of genotype and plant spacing and nitrogen fertilizer levels. Where as boll weight (B. wt.), Ginning out turn percentage (G.O.T %), staple length (SL) and fiber fineness were not affected significantly by the plant spacing, nitrogen fertilizer but effect due to genotype was significant for these traits. CLCuV (Cotton leaf curl virus) infestation % varied significantly due to genotypes while all other factors i.e., plant spacing and nitrogen fertilizer has non-significant effect. As the major objective of cotton cultivation is lint production for country and seed cotton yield for the farmers, the genotypes grown in narrow plant spacing 15 cm and higher nitrogen fertilizer level 11.0 bag of urea ha-1 produced maximum seed cotton yield under higher CLCuV infestation % (CIM-496, MNH-789 and BH-160) while the variety MNH-6070 gave maximum yield under 30 cm plant spacing and 8.6 bag of urea ha-1 as the 2.3% CLCuV infestation was observed upon this variety. From the present study it is concluded that the genotypes that are severally affected by CLCuV can be managed with increasing plant population and nitrogen fertilizer to achieve optimum seed cotton yield.
  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.
  Muhammad Iqbal , M. Zaffar Iqbal , Rao Sohail A. Khan , Khezir Hayat and M. A. Chang
  Mepiquat chloride (1, 1-dimethyl-piperidinium chloride) as a plant growth regulator that can used by producer to manage the crop development, uniformity and maturity. Field experiments conducted during 2002 and 2003 to evaluate the fact of row spacing and Mepiquat chloride application on cotton (Gossypium hirsutum L.) var. MNH-700. Four rates of Mepiquat chloride (4x123, 2x246, 4x246 and 4x370 mL ha-1) and a check with 0 mL ha-1 were evaluated for cotton growing in 25, 50 and 75 cm row spacing in 2002 and 2003. Plant height and number of total main stem nodes were different among row spacing and Mepiquat chloride application. The height was highest in plots where no application of Mepiquat chloride. Cotton grown in narrow row spacing (20 and 50 cm) had higher seed cotton yield than 75 cm row spacing, but reduce Ginning Out Turn (GOT) percentage in narrow row spacing negating any increase in seed cotton yield. In general reduced row spacing and Mepiquat chloride application did not lower fiber quality. In some cases, micronair was reduced in narrow row spacing (0.1), but values were in acceptable range for fiber traits. Mepiquat chloride is considered a desirable management tool to control crop growth. Ultra-narrow row spacing should practices only in the areas where plant growth is not accurate or upto the standard. In fertile soils, Mepiquat application is suggested for control of plant growth in efficient way under narrow row spacing in viewing the habit of cotton genotype.
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