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Articles by Ghulam Hassan
Total Records ( 9 ) for Ghulam Hassan
  Abdul Wahab Nassimi , Raziuddin , Sardar Ali , Ghulam Hassan and Naushad Ali
  Combining ability analysis of eight Brassica napus L. genotypes was estimated using diallel crosses. Analysis of variance for genotypes revealed highly significant differences (p=<0.01) for all traits. Components of combining ability analysis exhibited that, GCA was highly significant (p=<0.01) for 50% flowering, number of primary branches/plant and number of pods main/raceme, while non-significant for maturity and plant height whereas SCA and RCA effects were highly significant for all traits. GCA effects were higher than SCA and RCA for majority of the traits indicating that additive gene effects controlled the expression of these traits. RCA effects were greater than GCA and SCA for maturity showing that reciprocal crosses have higher potential than direct crosses for this trait. The parent genotypes NUR1, NUR2, NUR4, NUR7 and NUR8 and hybrids NUR1 x NUR3, NUR2 x NUR3, NUR2 x NUR4, NUR2 x NUR8, NUR4 x NUR2, NUR7 x NUR1, NUR8 x NUR2, NUR8 x NUR3 and NUR9 x NUR4 had higher GCA and SCA effects, respectively therefore could be used to develop early maturing, medium height and high yielding lines.
  Muhammad Shah Zaman , Azra Quraishi , Ghulam Hassan , Raziuddin , Sardar Ali , Abdul Khabir and Naheed Gul
  The effect of three different auxins viz, naphthalene acetic acid (NAA), indole acetic acid (IAA) and indole butyric acid (IBA) each at four levels (0, 0.1, 0.5 and 1.0 mg l-1) was evaluated on meristem culture of Potato (Solanum tuberosum L.) for production of virus-free plantlets. Maximum plantlet height (8.3 cm), largest number of nodes/plantlet (7.3) and highest number of leaves/plantlet (8.9) were recorded at 0.5 mg l-1 of NAA followed by IBA at 1 mg l-1, whereas extensive number of roots/plantlet (23.7) as well as the earliest microtuber formation (17 days, after transplantation) were recorded at 1 mg l-1 of IBA followed by NAA at 0.1 mg l-1. Largest root (4.2 cm) was observed for IAA at 1 mg l-1 concentration. Enzyme Linked Immunosorbent Assay (ELISA) test proved that all plants were free of Potato Virus X (PVX), Potato Virus Y (PVY) and Potato Leaf Role Virus (PLRV), except one which was positive for Potato Virus X (PVX) virus.
  C. Din , S.M.Mehdi , M.Sarfraz , Ghulam Hassan and M.Sadiq
  Artificially salinized soils were used to see the effect of foliar and soil application of K on rice. Results indicated that the number of tillers plant -1, paddy and straw yield and grains to straw ratio significantly decreased with the increase in salinity. All K application methods increased the above parameters significantly at all salinity levels over distilled water spray. Increasing levels of salinity decreased K concentration in shoots and straw, which was increased significantly by foliar and soil application. Both methods of K application remained at par with each other. Sodium concentration increased with increase in salinity in both shoots and straw and decreased by foliar and soil application of K. Foliar application of K proved better than soil application in this respect. The K/Na ratio decreased significantly by the increase of salinity, while this ratio increased significantly by the foliar and soil application of K.
  Masood Jan , Farhatullah and Ghulam Hassan
  The study was carried out to determine magnitude of heterosis for six heritable traits in sunflower. Study was conducted during 2000-2003 at NWFP Agricultural University, Peshawar on a 8x8 diallel cross of sunflower to find out the extent of heterosis for parameters like head size, achene yield/plant, achene number/plant, 100-achene weight, achene yield (kg ha-1) and oil content. Heterosis was observed for all the parameters studied. The magnitude of heterosis for different characters varied for the parameters studied and it was the maximum (32.88%) for head size and minimum (1.29%) for achene yield ha-1. No cross combination was consistent in heterosis for all characters studied. Maternal effects were significantly visible for traits like achene number/plant, achene yield ha-1 and oil content but not significantly visible for head size, achene yield/plant and 100-achene weight. For most of the characters except head size and achene number, heterosis was more in those cross combinations where parents were phenotypically at distance.
  Masood Jan, Farhatullah , Raziudin and Ghulam Hassan
  For determination of good combiners for physiological heritable traits, a study on a 8x8 diallel fashion in sunflower was conducted during 2003 at NWFP Agricultural University Peshawar Pakistan. The extent of combining ability for days to 50% flowering, days to maturity, achene yield (kg ha-1) and oil content was find out. The General Combining Ability (GCA), Specific Combining Ability (SCA) and Reciprocal Effects (RE) were significant for all the traits except days to maturity where RE were non-significant. The SCA effects were of greater magnitude than that of GCA effects, which showed high contribution of non-additive gene effects. The GCA:SCA ratio also revealed predominance of non-additive gene effects. Among the inbred lines TF-11, ARI and TF-4 were the best general combiners for all these traits. The best combiners for yield were ARI and GUL. The cross combination TF-335xARI was early in terms of days to 50% flowering and maturity. Generally the hybrids TF-4, TF-335, ARI and PESH performed well in nearly all parameters. Reciprocal crosses have higher potential than direct crosses for most of the traits. Both additive and non-additive variances were involved in the characterization of these physiological traits.
  Masood Jan , Ghulam Hassan , Iftikhar Khalil and Raziuddin
  An 8x8 full diallel set of bread wheat (Triticum aestivum L.) was studied for heterosis and heterobeltiosis. The magnitudes of heterosis (mid-parent) and heterobeltiosis (better-parent) from F1 were calculated for days to heading, flag leaf area, plant height, spike length, days to maturity and harvest index. All the 56 F1 hybrids and their parents were planted in a randomized complete block design in three replicates. Out of the 56 F1 hybrids, 18 and 16 hybrids for days to heading; 11 and 2 for flag leaf area; 24 and 15 for spike length; 8 and 3 for days to maturity and in 3 and 1 for harvest index expressed significant heterosis and heterobeltiosis, respectively. Maximum limits of heterobeltiosis for flag leaf area, spike length, harvest index, plant height, days to heading and days to maturity were 22.3, 13.03, 11.23, 3.27, 2.60 and 1.82%, respectively. Among parent cultivars, Takbeer, Inqilab-91, Tatara and Idaho-458 proved to be superior combiners. Populations of Tatara x Khattakwal, Takbeer x Inqilab-91, Idaho-458 x Fakhre Sarhad, Fakhre Sarhad x Takbeer and Ghaznav-98 x Takbeer were the best for most of the traits and their use in breeding programmes is suggested.
  Masood Jan , Farhatullah , Muhammad Tariq Jan , Ghulam Hassan and Raziudin
  A study on a 8x8 diallel fashion in sunflower was conducted at NWFP Agricultural University Peshawar Pakistan. The genetic analysis showed that additive and non-additive effects were significant for achene yield (kg ha-1). The maternal and non-maternal reciprocal effects were also controlling the inheritance of the trait. The non-additive effect was more pronounced from H1>D. The Wr/Vr did not give a slope so the mean degree of dominance (H1/D)1/2 better reflected the overdominance effect for the trait. In case of oil content, the Hayman complete analysis suggested the involvement of additive and non-additive components of variation. Dominance genetic vrainaces H1 and H2 were also significant indicated that genetic variances for oil content was under control of both additive and non-additive effects. The Wr/Vr graph indicated that overdominance is controlling oil content in these genetic materials. The heritability estimates in broad sense were from moderate to high while heritability estimates in narrow sense were low to moderate for both the traits.
  Masood Jan , Farhatullah , Ijaz Begum , Ghulam Hassan and Iftikhar Khalil
  The objective of this study was to determine magnitude of heterosis for yield and oil content in sunflower. For this purpose, a study was conducted during 2003-2004 at NWFP Agricultural University, Peshawar on a diallel cross of sunflower to find out the extent of heterosis for achene yield (kg ha-1) and oil content (g kg-1). Heterosis was observed for these both parameters. The magnitude of heterosis of F1 over mid-parent was 1.29 in direct crosses while 3.73% in reciprocal crosses for achene yield ha-1. Similarly the magnitude of heterosis for oil content was 31.19 in direct crosses while this magnitude was 5.71% in reciprocal crosses for oil content in sunflower. The study showed that the direct and reciprocal crosses showed totally different magnitude of heterosis for both traits studied. In cross combinations heterosis for both traits was more in those crosses where parents were phenotypically at distance.
  Masood Jan , Ghulam Hassan , Iftikhar Hussain and Razi-u-Din
  An experiment was conducted to determine the combining ability of yield and yield components in sunflower. There was a significant difference for General Combining Ability (GCA), Specific Combining Ability (SCA) and Reciprocal Effect (RE) for all the traits studied except for 100-achene weight where the GCA effect was found non-significant. In the estimates of variances, the SCA for the traits were more than GCA showing non-additive effects for all the traits, GCA: SCA ratio also indicated predominance of non-additive gene effect for these traits. Additive and non-additive contributed equally to the inheritance of the achene number plant-1 and this can easily be judged from GCA: SCA ratio. Among the inbred lines, TF-1 was the best general combiner for head size and 100-achene weight though its GCA effect was not significant for the latter. Inbred line ARI was the best general combiner for the achene yield plant-1 and achene yield kg ha-1, while TF-4 was the best combiner for achene number plant-1. Different cross combinations showed different response with respect to GCA, SCA and RE for various traits studied. Only cross combination TF-335xPESH was consistent for having high SCA for head size and achene yield kg ha-1 and TF-335xTF-11 exhibited high RE effect for achene yield plant-1 and 100-achene weight.
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