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Muhammad R.W.,PARC Research and Training Station | Qayyum A.,Bahauddin Zakariya University | Hamza A.,PARC Research and Training Station | Ahmad M.Q.,Bahauddin Zakariya University | And 5 more authors.
Genetics and Molecular Research | Year: 2015

Fifty-four genotypes of maize were crossed and evaluated in the field during the crop season in February 2012 under both normal and water stress conditions. To identify the major parameters responsible for variation among genotypes, single linkage cluster analysis and principle component analysis (PCA) were carried out. Thirteen characters were studied. The PCA showed that the first six components, with eigen values >1, contributed 82.30% of the variability among the genotypes under normal field irrigation conditions while other PCs (7-13) had eigen values less than 1. Under drought conditions, the first four PCs, with eigen values >1, contributed 64.79% of the variability among genotypes while the other PCs (5-13) had eigen values less than 1. In the absence of water stress, heritability ranged from 68% (sucrose content) to 99% (plant height) and genetic advance ranged between 158.43% for stomatal frequency and 0.87 for biological yield. Under drought conditions, the coefficient of variability (CV) was 1.43-7.79, whereas estimates of heritability ranged between 68% and 99% for sucrose content and leaf area, respectively. The values of genetic advance ranged between 153.41 for stomatal frequency and 0.47 for nitrogen content. CV was 1.52-7.38 under drought conditions. The results indicated that the plant characters studied were under the control of additive genetic effects and suggested that selection should lead to fast genetic improvements. Clusters with superior agronomic types were identified and could be exploited for the transfer of desirable genes to improve the yield potential of the maize crop. © FUNPEC-RP. Source


Muhammad R.W.,PARC Research and Training Station | Ahmad M.,PARC Research and Training Station | Umar M.I.,Bahauddin Zakariya University | Qayyum A.,Bahauddin Zakariya University | And 11 more authors.
Journal of Food, Agriculture and Environment | Year: 2013

To identify the major parameters which account for variation among fifty genotypes of Mungbean (Vigna radiata L.), they were studied using single linkage cluster analysis (SLCA) and principle component analysis (PCA). Ten characteristics were studied: days to flowering (DF), days to maturity (DM), plant height (PH), primary branches per plant (PBP), secondary branches per plant (SBP), number of pods per plant (NPP), pod length (PL), seeds per pod (SPP), seed yield per plant (SYPP) and thousand seed weight (TSW). The first four components, with eigen values >1 contributed 65.1138% of the variability among the genotypes. First PC was more related to all ten characters (SB, PB, PH, SP, PL, SYP, PP, TSW, DF and DM) whereas the second PC relates to four characters (TSW, SYP, PH and PP). Third PC exhibited positive effect for five parameters (PL, TSW, PH, DF and PB) but fourth PC was positive to four characters (PL, SB, SP and PP). Highest estimates of heritability were ranged between 0.906 (DF) to 0.998 (SYPP) in all characters except 0.603 (DM). Genetic advance ranged between 13.0432 for NPP and 1.1841 for PL. Positive and significant correlation was exhibited by most of the traits. Greater magnitude of broad sense heritability coupled with higher genetic advance in characters under study provided the evidence that these plant characters were under the control of additive genetic variance indicating that selection should lead to a fast genetic improvement of the material. Clusters with superior agronomic traits identified, may be exploited for genetic potential to transfer the desirable genes to improve yield potential of the mungbean crop. Source


Ahmad M.,PARC Research and Training Station | ud-Din S.B.,Pest Warning and Quality Control of Pesticides | Muhammad R.W.,PARC Research and Training Station | Liaqat S.,Bahauddin Zakariya University | And 11 more authors.
Journal of Food, Agriculture and Environment | Year: 2013

One hundred genotypes of mungbean (Vigna radiata L. Wilczek) were screened against MYMV during kharif season under in vitro conditions at PARC Research and Training Station, College of Agriculture, B.Z., University, Multan. The germplasm was ranked into tolerant and susceptible depending upon severity of disease. The diversified response of mungbean genotypes to MYMV showed that 35 genotypes were exposed to be tolerant while moderately tolerant (MT) rank included 17 genotypes and 10 genotypes were moderately susceptible (MS) showing infection of MYMV. Six genotypes were designated as susceptible ones and the remaining eight were highly susceptible indicating mungbean yellow mosaic virus (MYMV). Source


Liaqat S.,Bahauddin Zakariya University | Qayyum A.,Bahauddin Zakariya University | Muhammad R.W.,PARC Research and Training Station | Hamza A.,PARC Research and Training Station | And 13 more authors.
Journal of Food, Agriculture and Environment | Year: 2014

To recognise the foremost parameters accounting for variation, one hundred and twenty eight genotypes of barley (Hordeum vulgare L.) were studied using Single Linkage Cluster Analysis (SLCA) and Principal Component Analysis (PCA). Nine characters were studied. The first four components, with eigen values P > 1, contributed 62.52% of the total variability among the genotypes. The first PC was more related to four characters (SL, S/S, G/S, G/P), whereas the second PC relates two characters (S/P, G/P). The third PC exhibited positive effects for five parameters (T/P, SL, S/P, S/S, G/ S) but the fourth PC was positive to three characters (FLA, G/S, 100 GW). The highest estimates of heritability were associated with G/P (0.977) and T/P (0.886). Values of genetic advance ranged between 66.66 for G/P and 0.367 for SL. Greater magnitude of broad sense heritability coupled with higher genetic advance in characters under provided the evidence that these plant characters were under the control of additive genetic effects, indicating that selection should lead to a fast genetic improvement of the material. Cluster with superior agronomic types identified may be exploited for genetic potential to transfer the desirable genes to improve yield potential of the barley crop. Source

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