Trends in Regional and Chronological Diversity of Maize (Zea mays L.) germplasm in Pakistan. | [Pakistan Journal of Botany • 2019]

Author(s):

1. Muhammad Amir Maqbool: Plant Breeding and Genetics, University of Agriculture Faisalabad, Pakistan: Currently at International Maize and Wheat Improvement Center (CIMMYT), Pakistan

2. Muhammad Aslam: Plant Breeding and Genetics, University of Agriculture Faisalabad, Pakistan

3. Abdurahman Beshir: International Maize and Wheat Improvement Center (CIMMYT), South Asia Regional Office, Nepal

4. Babar Manzoor Atta: Agriculture and Biophotonics Division, National Institute of Lasers and Optronics (NILOP), Nilore, Islamabad, Pakistan

Abstract:

Maize germplasm was exclusively collected across Pakistan to probe the trends in genetic variability at regional levels and chronological periods. A total of 290 accessions were collected from 6 different regions. These were comprised of the following chronological order: 1980-1984, 1985-1990, 1991-2000, 2001-2007 and 2008-2016. These accessions represents maize growing provinces of Pakistan except Sindh. The performance of these entries were compared in the field and the data for different agronomic and yield related traits were subjected to statistical analysis. Mean comparison showed that Punjab region has highest mean grain yield followed by Azad Jammu & Kashmir (AJK). Regional differences in genetic diversity of maize germplasm were evident; AJK and Punjab possessed comparatively high genetic differences for various traits. Differences in the genetic variability across the region showed that various variability changing forces worked differently in different regions. Chronological studies showed that grain yield had been improving in Pakistan since 1980s. Highest grain yield was observed during the recent period (2008-2016) compared to earlier periods. Genetic diversity among available maize germplasm did not continuously reduce during the last 36 years based on the findings of this study. In the earlier years diversity showed increasing trend followed by declining trend. Highest genetic diversity was observed in the genotypes collected during 1980-1984 whereas, again there was boost in diversity during 1991-2000. It has been observed that addition of newly developed and better performing genotypes into informal seed system initially increased the diversity followed by substitution of traditional accessions which led to change in genetic variation in Pakistan. The gradual change in patterns of genetic variability in maize at regional and chronological levels in Pakistan emphasizes the importance of conserving genetic resources to avoid genetic vulnerability and depletion.

Page(s): 521-533

DOI: 10.30848/PJB2019-2(19)

Published: Journal: Pakistan Journal of Botany, Volume: 51, Issue: 2, Year: 2019

Keywords:

Yield and yield components , Postdomestication era , Biological diversity , Genetic erosion , Chronological periods , PCA biplots , Agronomic traits Arrange them alphabetically

References:

[1] Ahmad , M.Q.,S.H.Khan,F.M.Azhar, 2012.Decreasing level of genetic diversity in germplasm and cultivars of upland cotton (Gossypium hirsutum L.) in Pakistan,J. Agri. Soc. Sci. 8 92 -96

[2] Ahmad , S.Q.,S.Khan,M.Ghaffar,F.Ahmad, 2011.Genetic diversity analysis for yield and other parameters in maize (Zea mays L.) genotypes,Asian J. Agri. Sci. 3 385 -388

[3] Ali , W.,K.Ahmad,I.Munir,A.Khan, 2007.Genetic variability among maize hybrids for yield and yield components,Sarhad J. Agri. 23 75 -80

[4] Anonymous, 2002.Review and development of indicators for genetic diversity, genetic erosion and genetic vulnerability (GDEV): summary report of a joint FAO, 11 -14

[5] Aslam , M.,M.Zeeshan,M.A.Maqbool,B.Farid, 2014.Assessment of drought tolerance in maize (Zea mays L.) genotypes at early growth stages by using principle component and biplot analysis,The Exp. 29 1943 -1951

[6] Aslam , M.,M.A.Maqbool,M.Yaseen,Q.U.Zaman, 2015.AMMI Biplot analysis for comparative evaluation ofmaize genotypes under different saline environments,Pak. J. Agri. Sci. 52 339 -347

[7] Aslam , M.,M.A.Maqbool,S.Akhtar,W.Faisal, .Estimation of genetic variability and association among different physiological traits related to biotic stress (Fusarium oxysporum L.) in chickpea,J. Anim. Plant Sci. 23 1679 -1685

[8] Aslam , M., S.M.A.,Basra , M.A.,Maqbool , H.,Bilal , Q.U.,Zaman and S.,Bano, .Physio-chemical distinctiveness and metroglyph analysis of cotton genotypes at early growth stage under saline hydroponic,Int. J. Agri. Biol 15 1133 -1139

[9] Brush , S.B., 1999.Genetic erosion of crop populations in centers of diversity: a revision. In: Proceedings of the technical meeting on the methodology of the FAO world information and early warning system on plant genetic resources held at the Research Institute of Crop Production, 21 -23

[10] Davari , A.,K.Khoshbakht,A.G., 2013.A qualitative assessment of diversity and factors leading to genetic erosion of vegetables: a case study of Varamin (Iran),Int. J. Agri. Sci. 3 198 -212

[11] Frankel , O.H.,E.Bennett, 1970.Genetic resources in plantstheir exploration and conservation,Blackwell Scientific Publications -

[12] Gabriel , K.R., 1971.The biplot graphic display of matrices with application to principal component analysis,Biometrika 58 453 -467

[13] Goodman , M.M., 2005.Broadening the U.S. maize germplasm base,Maydica 50 203 -214

[14] Hammer , K.,G.Laghetti, 2005.Genetic erosion - examples from Italy,Gen. Res. Crop Evo 52 629 -634

[15] Hammer , K.,Y.Teklu, 2009.Plant genetic resources: selected issues from genetic erosion to fenetic engineering,J. Agri. Rural Dev 109 15 -50

[16] Harlan , J.R.,O.H.,E.Bennett, 1970.Evolution of cultivated plants,Genetic Resources in Plants IBP Handbook No 11. London: International Biological Programme 19 -32

[17] Harlan , J.R., 1975.Our vanishing genetic resources,Science 188 618 -621

[18] Heerwaarden , J.V.,J.Hellin,R.F.Visser,F.A. van Eeuwijk., 2009.Estimating maize genetic erosion in modernized smallholder agriculture,Theor. Appl. Genet 119 875 -888

[19] Hussain. N.,M.Y.Khan,M.S.Baloch,Anim, 2011.Screening of maize varieties for grain yield at Dera Ismail Khan, 21 626 -628

[20] Johannessen , C.L.,A.Z.Parker, 1989.Maize ears sculptured in 12th and 13th century A.D. India as indicators of preColumbian diffusion, 43 164 -80

[21] Louette , D.,M.Smale, 2000.Farmers' seed selection practices and traditional maize varieties in Cuzalapa, Mexico, 113 25 -41

[22] Mahmood , Z.,S.U.Ajmal,M. Irfanand M. Ashraf, 2004.Genetic studies for high yield of maize in Chitral valley,Int. J. Agric. Biol 6 788 -789

[23] Maqbool , M.A.,M.Aslam,H.Ali,T.M.Shah,B.M.Atta, 2015a.GGE biplot analysis basedselection of superior chickpea (Cicer arietinum L.) inbred lines under variable water environments, 47 1901 -1908

[24] Maqbool , M.A.,M.Aslam,H.Ali,T.M.Shah,B.Farid,Q.U.Zaman, .Drought tolerance indices based evaluation of chickpea advanced lines under different water treatments,Res. Crops 16 336 -344

[25] Myers , N., 1994.Protected areas-protected from a greater what? Biodiv, 3 411 -418

[26] Naveed. S.,M.Aslam,M.A.Maqbool,S.Bano,Q.U.Zaman,R.M.Ahmad, 2014.Physiology of high temperature stress tolerance at reproductive stages in maize,J. Anim. Plant Sci. 24 1141 -1145

[27] Rebourg , C.,M. Chastanet , B.,Gouesnard , C.,Welcker , P.,Dubreuil and A.,Charcosset, 2003.Maize introductioninto Europe: The history reviewed in the light of molecular data,Theor. Appl.Genet 106 895 -903

[28] Steel , R.G.D.,J.H.Torrie,D.A.Dickey, 1997.Principles and procedures of statistics. A biometrical approach,McGraw Hill Book Co -

[29] Stephen , R.M.,M.Calibo,M.Garcia-Belen,J.L.Pham,F.Palis, 2002.Natural hazards and genetic diversity in rice,Agric. Human Values 19 133 -149

[30] Tahir , M.,A.Tanveer,A.Ali,M.Abbas,A.Wasaya, 2008.Comparative yield performance of different maize (Zea mays L.) hybrids under local conditions of FaisalabadPakistan,J. Life Soc. Sci. 6 118 -120

[31] Thrupp , L.A., 1998.Cultivating diversity: agrobiodiversity and food security, -

[32] Turi , N.A.,S.S.Shah,S.Ali,H.Rahman,T.Ali,M.Sajjad, 2007.Genetic variability for yield parameters in maize (Zea mays L.) genotypes,J. Agric. Biol. Sci. 2 1 -3

[33] Van de Wouw , M., C.,Kik , T. van Hintum,B.Visser, 2009.Genetic erosion in crops: concept,research results and challenges,Plant Genet. Res.: Charact 8 1 -15

[34] Worede , M.,H.Mekbib,de BoefWKA,WellardK,BebbingtonA, 1993.Linking genetic resource conservation to farmers in Ethiopia, 78 -84

[35] Younas , M.,H.Rahman,H.Hayder, 2002.Magnitude of variability for yield and yield associated traits in maize hybrids,Asian J. Plant Sci. 1 694 -696

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