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Articles by Abdul Wahab Nassimi
Total Records ( 3 ) for Abdul Wahab Nassimi
  Abdul Wahab Nassimi , Raziuddin , Sardar Ali and Naushad Ali
  To estimate mid-parent and better-parent heterosis in Brassica napus L. an experiment was conducted at NWFP Agricultural University, Peshawar, during 2004-05 and 2005-06 using 8x8 full diallel crosses. All the 56 F1 hybrids and their parents were planted in a randomized complete block design with three replications. Out of 56 hybrids, negative mid-parent and better-parent heterosis were estimated in 28 and 25 hybrids for 50% emergence, in 30 and 17 hybrids for 50% flowering, in 34 and 49 hybrids for physiological maturity and in 27 and 38 hybrids for plant height, respectively whereas positive heterosis were estimated in 28 and 23 crosses for primary/branches plant. However, significant negative mid-parent and better-parent heterosis were recorded in 6 and 7 hybrids for 50% emergence, in 17 and 04 for 50% flowering, in 11 and 20 for physiological maturity, in 27 and 36 for plant height while significantly positive heterosis was recorded in 27 and 23 crosses for primary branches/plant, respectively. Better-parent heterosis reduced to 25% for emergence, 2.78% for flowering, 4.08% for maturity and 21.22% for plant height whereas it reached to 50% for branches/plant. Among parents, NUR1, NUR2, NUR4, NUR5 and NUR9 were found superior when used in different cross combinations. Hybrids NUR3xNUR4, NUR5xNUR1 and NUR5xNUR7 could be used to develop early maturing while NUR3xNUR2 and NUR5xNUR8 would be helpful to develop medium sized with robust structured brassica lines that could be tolerant to lodging with greater yields.
  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.
  Ubaidullah , Raziuddin , Tila Mohammad , Hafeezullah , Sardar Ali and Abdul Wahab Nassimi
  Wheat production is often reduced by terminal heat stress therefore present study was aimed to characterize wheat genotypes for their heat tolerance for some important traits. Plant material was composed of sixteen wheat (Triticum aestivium L.) genotypes including two check cultivars. Wheat genotypes were sown in the field at two dates i.e., November 15 (normal sowing) and December 13 (delayed sowing) during winter seasons of 2003-2004 and 2004-2005. Combined analysis of variance (for two years) showed that mean values for years were highly significant at p=<0.01 for majority of the traits, differences were significant (p=<0.05%) for grain filling duration while non-significant for days to emergence. For seasons; differences were highly significant for all parameters, whereas for genotypes; the differences were highly significant for all parameters except grain filling duration where differences were non significant whereas, response for different interactions was variable. In present experiment, generally late sowing imposed negative effects on all traits. However, two years combined data showed that minimum difference between early and late sowing was 23 days for heading (CT-4), 7 cm for leaf area (CT-12, 13 and 14), 6.3 cm for plant height (CT-10) and 3 days for grain filling duration (CT-9) whereas, CT-10 matured 29 days earlier when sown late in comparison to the normal sowing time. From the experiment it was concluded that CT-4 and CT-10 had built in terminal heat stress escape mechanism which could be used for the development of new early maturing variety.
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