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Frontiers of Agriculture in China

ISSN 1673-7334

ISSN 1673-744X(Online)

CN 11-5729/S

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Front Agric Chin    2011, Vol. 5 Issue (4) : 486-496    https://doi.org/10.1007/s11703-011-1113-3
RESEARCH ARTICLE
Genetic model analysis on seedling and maturity traits in wheat under rainfed conditions
Shahid Iqbal AWAN1, Muhammad Shahzad AHMED2(), Jehanzeb FAROOQ3(), Syed Dilnawaz AHMAD1, Muhammad ILYAS1, Asad Hussain SHAH1, Muhammad Fareed KHAN1, Sardar ALI1, Lutful HASAN4
1. Department of Plant Breeding and Molecular Genetics, Faculty of Agriculture, Rawalakot, Azad Jammu & Kashmir, Pakistan; 2. Department of Plant Breeding and Genetics, University of Agriculture, Faisalabad, Pakistan; 3. Cotton Research Institute, Ayub Agricultural Research Institute, Faisalabad, Pakistan; 4. Department of Genetics & Plant Breeding, Bangladesh Agricultural University, Mymensingh-02202, Bangladesh
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Abstract

An experiment was conducted to access the genetic variability among early vigour and quantitative traits under limited moisture in F2 generation of a 5 × 5 diallel cross of bread wheat. The results indicated that there was significant genotypic variation among the genotypes. Additive dominance model revealed full fitness of the data for RL, DSW, FRW, DRW, spike length, and 1000-grain weight but was partially fit for SL, FSW, R/S, tillers per seedling, plant height, tillers per plant, spikelets per spike, and grain yield per plant. The partially adequate models for these plant characters might be due to the presence of non-allelic interaction, linkage, and non-independent distribution of the genes in the parents. Additive genes coupled with moderate to high narrow sense heritability were involved in the heritage of all the traits, which indicated a higher scope of selection in early generations.
Keywords wheat      seedling trait      maturity trait      genetic model      rainfed condition     
Corresponding Author(s): AHMED Muhammad Shahzad,Email:ms.ahmedgenes@gmail.com; FAROOQ Jehanzeb,Email:jehanzeb1763@hotmail.com   
Issue Date: 05 December 2011
 Cite this article:   
Shahid Iqbal AWAN,Muhammad Shahzad AHMED,Jehanzeb FAROOQ, et al. Genetic model analysis on seedling and maturity traits in wheat under rainfed conditions[J]. Front Agric Chin, 2011, 5(4): 486-496.
 URL:  
https://academic.hep.com.cn/fag/EN/10.1007/s11703-011-1113-3
https://academic.hep.com.cn/fag/EN/Y2011/V5/I4/486
Source of variationReplicationsGenotypesError
Root length (cm)0.07NS2.53**0.073
Shoot length (cm)0.16NS5.75**0.271
Fresh shoot weight (cm)0.04NS2.40**0.15
Dry shoot weight (cm)0.01NS0.28**0.007
Fresh root weight (cm)0.04NS0.25**0.012
Dry root weight (cm)0.001 NS0.03**0.001
Root shoot ratio (cm)0.001NS0.02**0.001
Tillers per seedling0.07NS2.21**0.069
Plant height (cm)18.7NS35.1**7.515
Tillers per plant0.21NS2.10**0.342
Spike length (cm)0.08NS0.65**0.113
Spikelets per spike-0.86NS10.5**1.521
1000-grain weight (g)3.35NS13.3**3.09
Grain yield per plant- (g)213.8NS899.1**329.2
Tab.1  Mean squares for various yield-related parameters
ParametersTest for b = 0Test for b = 1Mean squares of Wr+ VrMean squares of Wr- VrFitness
Root length (cm)11.53*0.81NS8.44**3.28NSFull
Shoot length (cm)10.12*0.15NS1.47NS0.25NSPartial
Fresh shoot weight (cm)8.42*-0.78NS2.29NS0.38NSPartial
Dry shoot weight (cm)7.68*1.20NS6.88 **0.53NSFull
Fresh root weight (cm)23.63*-0.69NS3.92*0.07NSFull
Dry root weight (cm)8.23*0.19NS4.91*0.47NSFull
Root shoot ratio (cm)7.64*-0.18NS2.22NS0.29NSPartial
Tillers per seedling8.59*0.85NS1.81NS0.58NSPartial
Plant height (cm)5.97 *0.34NS0.15NS0.09NSPartial
Tillers per plant4.29*0.37NS1.15NS0.36NSPartial
Spike length (cm)5.56*-0.15NS5.71*1.46NSFull
Spikelets per spike7.27*0.07NS2.93NS2.52NSPartial
1000-grain weight (g)8.62*-0.86NS5.57*0.63NSFull
Grain yield per plant (g)16.02*-0.28NS0.90NS0.79NSPartial
Tab.2  Adequacy test of additive dominance-model for yield related traits
Components of variationDH1H2Fh2EH1/DH2/4H1(4DH1+F/4DH1-Fh2 (n.s.)
Root length (cm)1.27±0.050.55±0.130.46±0.12-0.30±0.120.47±0.080.03±0.010.650.210.690.85
Shoot length (cm)2.27±0.040.01±0.100.006±0.09-0.15±0.090.15±0.060.10±0.020.080.110.410.92
Fresh shoot weight (cm)1.58±0.0670.41±0.150.32±0.140.45±0.140.20±0.090.05±0.020.510.21.790.82
Dry shoot weight (cm)0.14±0.0060.05±0.010.04±0.010.04±0.010.004±0.0090.003±0.0020.590.211.640.8
Fresh root weight (cm)0.19±0.0020.009±0.0040.008±0.0030.03±0.0040.01±0.0030.004±0.0060.210.241.990.93
Dry root weight (cm)0.015±0.0020.0056±0.0260.0039±0.0240.0014±0.013-0.004±0.0160.0002±0.0010.610.181.170.87
Root shoot ratio (cm)0.011±0.0030.001±0.0070.001±0.0070.003±0.0070.0002±0.0040.0003±0.0010.340.222.110.88
Tillers per seedling1.78±0.020.06±0.040.05±0.040.35±0.040.01±0.030.03±0.0070.190.213.220.95
Plant height (cm)12.4±0.33-5.15±0.90-4.11±0.81-4.93±0.83-1.91±0.553.02±0.140.650.20.530.8
Tillers per plant-11.14±0.800.22±0.860.14±0.790.69±0.40-1.43±0.530.11±0.030.430.175.670.63
Spike length (cm)0.41±0.02-0.003±0.04-0.006±0.040.11±0.04-0.02±0.030.04±0.0070.080.58-4.190.79
Spikelets per spike7.83±0.14-0.15±0.380.07±0.340.99±0.350.95±0.230.57±0.060.14-0.112.680.85
1000-grain weight (g)6.18±0.21-1.46±0.57-1.22±0.511.61±0.52-0.53±0.351.17±0.090.490.211.730.71
Grain yield per plant (g)428.23±6.2-1335.8±67.5-1033.3±61.2162.52±30.9-1320.3±41.3109.72±2.51.770.191.240.75
Tab.3  Estimation of the components of genetic variation
Fig.1  r/r graph for root length.
Fig.2  r/r graph for seedling length.
Fig.3  r/r graph for FSW.
Fig.4  r/r graph for DSW.
Fig.5  r/r graph for FRW.
Fig.6  r/r graph for DRW.
Fig.7  r/r graph for R/S.
Fig.8  r/r graph for tillers per seedling.
Fig.9  r/r graph for plant height.
Fig.10  r/r graph for tillers per plant.
Fig.11  r/r graph for spike length.
Fig.12  r/r graph for spikelets per spike.
Fig.13  r/r graph for 1000-grain weight.
Fig.14  r/r graph for grain yield per plant.
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