Person: Maqbool, M.A.
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Maqbool
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M.A.
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Maqbool, M.A.
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0000-0001-6112-016X 8 results
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- Results of regional maize trials conducted in Pakistan years 2016-2017(CIMMYT, 2020) Issa, A.B.; Maqbool, M.A.; Khokhar, E.S.; Anwar, M.W.; Imtiaz, M.
Publication - Results of regional maize trials conducted in Pakistan, years 2014-2015(CIMMYT, 2020) Issa, A.B.; Maqbool, M.A.; Khokhar, E.S.; Anwar, M.W.; Saleem, S.; Imtiaz, M.
Publication - Grain yield performance of heat stress tolerant maize hybrids under heat prone areas of Pakistan(CIMMYT, 2018) Issa, A.B.; Maqbool, M.A.; Khokhar, E.S.; Anwar, M.W.; Imtiaz, M.Heat stress has seriously adverse effects on growth, development and yield of maize. Heat stress during reproductive growth stages may reduce the yield by 101Kg ha day (Smith,1996). Extremely high temperature (45-48 C) during reproductive growth stages has drastic effects on maize productivity (Ulukan, 2009). Productivity losses in maize are attributed to flower abortion, desiccation of pollen grains & silk, reduced pollen viability & germination, fertilization failure and reduced seed size under heat stress (Sinsawat,2004). Leaf growth is reduced at 35 – 40 C while beyond that temperature there is serious reduction in photosynthesis, protein denaturation, inhibition of protein biosynthesis and enzyme inactivation are reported (Wahid et al., 2007). Day temperature may rise above 45 C in major maize growing areas of Punjab, Pakistan during spring season. Therefore, deployment of heat stress tolerant maize varieties is among the coping strategies to mitigate the increasing challenge of maize farming in Pakistan.
Publication - Adaptation Pattern of Exotic Provitamin A Biofortified Maize Hybrids in Pakistan(CIMMYT, 2018) Issa, A.B.; Maqbool, M.A.; Khokhar, E.S.; Anwar, M.W.; Imtiaz, M.; Saleem, S.
Publication - Parametric analysis of yield stability and agronomic performance of exotic QPM hybrids in Pakistan(CIMMYT, 2018) Issa, A.B.; Maqbool, M.A.; Khokhar, E.S.; Anwar, M.W.; Imtiaz, M.; Saleem, S.South Asia is one of the regions in Asia where chronic malnutrition affects nearly half of the pre-school children. In Pakistan almost 45% of children (<5 years) are reported to be stunted. To alleviate the problem of malnutrition in Pakistan, nine QPM hybrids were introduced from CIMMYT-Colombia and evaluated for yield and agronomic performance across different locations; (I) National Agricultural Research Centre (NARC), Islamabad, (II) Maize and Millets Research Institute (MMRI), Yousafwala, (III) Jullundhur Private Limited (JPL), Arifwala, (IV) Four Brothers Private Limited (4B), Lahore, (V) Tara Crop Sciences (TCS), Sahiwal and (VI) ICI Pakistan Limited (ICI) Sahiwal, and in different seasons (Spring-2014, Kharif-2014 & Spring-2015). Significant differences in the performance of QPM hybrids were observed across the locations and seasons for different agronomic and yield related traits. Mean comparison for grain yield evidently elaborated the differences in performance of hybrids across the locations. These statistical inferences showed that cross-over interactions were present between hybrids and locations therefore GGE comparison biplot analysis was used as multivariate statistical tool to dissect the genotype × environment interaction. Location, season and hybrids comparison GGE biplots were drawn. JPL, 4B and TCS during spring season were found most productive, representative and discriminating locations whereas MMRI during kharif season was found as least discriminating and low yielding location for these QPM hybrids. Seasonal comparison showed that spring season is more productive than kharif season for these QPM hybrids. Hybrid comparison showed that 1 (SA2146-38), 3 (SA2146-40), 4 (SA2146-75) and 2 (SA2146-39) hybrids were highly productive across the locations and across the seasons therefore commercialization of these QPM hybrids is recommended in Pakistan to combat malnutrition through direct and indirect consumption.
Publication - Open pollinated maize varieties: do they have scope in south Asia? Lessons from Pakistan(CIMMYT, 2018) Issa, A.B.; Maqbool, M.A.; Khokhar, E.S.; Anwar, M.W.; Saleem, S.; Imtiaz, M.The bulk (above 70%) of Pakistan's 6 million tons maize production comes from the Punjab province where farmers use predominately (90%) hybrid maize. However, hybrid covers about 30-40% of the maize area in Pakistan and farmers in the northern areas use open pollinated varieties (OPVs). Absolute replacement of OPVs with hybrids is not feasible due technical skills, resource limitations and financial constraints. Therefore, current study explored the grain yield potential of improved OPVs and their adaptation pattern at the different agro ecologies of Pakistan.
Publication - Assessment of agronomic performance of kernel Zinc fortified maize genotypes in Pakistan(CIMMYT, 2018) Issa, A.B.; Maqbool, M.A.; Khokhar, E.S.; Anwar, M.W.; Imtiaz, M.According to the National Nutrition Survey-2011, 47.6% of pregnant women, 41.3% of nonpregnant women and 39.2% of children are Zinc deficient in Pakistan. Zinc fortified maize can be an alternative approach to enhance dietary quality of vulnerable communities. However, the agronomic performance of these varieties should be better or at par with widely cultivated varieties for rapid adoption by farmers. Therefore, current study is focused on evaluation of agronomic performance of Zn enriched maize genotypes.
Publication - Evaluation of single cross yellow maize hybrids for agronomic and carotenoid traits(Friends Science Publishers, 2017) Maqbool, M.A.; Aslam, M.; Khan, M. S.; Issa, A.B.; Ahsan, M.Provitamin A bioforitification of maize endosperm was found to be most convenient solution to the resolve its deficiency in the masses. Continuous efforts for persistent evaluation of diverse genetic material are prerequisite for genetic improvement of maize endosperm for provitamin A. Distinctively selected inbred lines and testers were evaluated for their yield and provitamin A related performance in single cross F1 hybrid combinations. Total 50 single cross hybrids were evaluated for different agronomic and carotenoid related traits. Significant differences were observed among genotypes, lines, testers and line × tester interaction for studied traits. L5, L6 and T1 had high GCA effects for YPH, RPC and FW whereas, L1, L5 and T4 had high GCA effects for TCC, PVAC and NPVAC. Among studied crosses, L7×T3, L8×T4 and L5×T2 had high SCA effects for PVAC whereas, L2×T5, L3×T3 and L4×T2 had high SCA effects for YPH. L3×T3 had high SCA effects for YPH, TCC, PVAC and NPVAC. L8×T4 had high SCA effects for PVAC, RPC and FW. L2×T5 had high SCA effects for PVAC, YPH, NPVAC and TCC. Most of variability was contributed by L×T interaction which showed that performance of the parents could only be evaluated in specific cross combinations. Phenotypic variances and phenotypic coefficient of variations were higher which showed that performance of the crosses was also dependent on the environmental factors. Gene action showed that all of the traits were under the control of non-additive gene action which strongly directs the manipulation of heterosis breeding for genetic improvement of studied traits. L3×T3, L5×T4, L3×T1, L4×T3, L2×T1, L8×T3 and L5×T2 for RPC and TCC whereas, L1×T1, L3×T5, L7×T1, L10×T5, L7×T2 and L9×T1 for FW, YPH and PVAC had highest better parent heterosis. Results of Kempthorne’s analysis and GGE biplot analysis were comparable for estimation of GCA, SCA effects and identification of desired crosses. Therefore, GGE biplot could be preferred for providing visual explanation of the effects and additionally provides information about heterotic grouping of testers, SCA effects of parents, best parent and best crosses. Combining ability, gene action and heterosis studies based on Kempthorne’s analysis and GGE biplot analysis revealed that genetic improvement can be made for studied agronomic and carotenoid related traits. Improvement of yield and provitamin A carotenoids may help the peoples of Pakistan to suffice the food security issue and to alleviate the sub-clinical symptoms of vitamin A deficiency.
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