Clonal variation and correlation of seed characters in Hevea brasiliensis Muell. Arg. |
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| Institution: | 1. Rubber Research Institute of Nigeria, P.M.B. 1049, Benin City, Nigeria;2. Department of Crop Science, University of Benin, Benin City, Nigeria;1. Department of Pediatrics, The Labatt Family Heart Centre, Division of Cardiology, The Hospital for Sick Children, Temerty Faculty of Medicine, Toronto, Ontario, Canada;2. Department of Pediatric Cardiology, Oslo University Hospital, Rikshospitalet, Oslo, Norway;3. Division of Cardiovascular Surgery, The Hospital for Sick Children, Temerty Faculty of Medicine, Toronto, Ontario, Canada;4. Stanford University School of Medicine, Palo Alto, California, USA;1. State Key Laboratory of Rice Biology, IAEA Collaborating Center, Institute of Nuclear Agricultural Sciences, Zhejiang University, Hangzhou 310029, China;2. Hubei Collaborative Innovation Center for Grain Industry, College of Agriculture, Yangtze University, Jingzhou 434023, China;3. Department of Plant and Environmental Sciences, Faculty of Sciences, University of Copenhagen, 1871 Frederiksberg, Denmark;1. Universidade do Estado de Mato Grasso/UNEMAT, CP 08, Rua Prof. Dr. Renato Figueiro Varella, Nova Xavantina, Mato Grosso State, 78690-000, Brazil;2. Faculdade de Filosofia, Ciências e Letras de Ribeirão Preto/USP, Ribeirão Preto, SP, 14040-901, Brazil;3. Faculdade de Engenharia de Ilha Solteira/UNESP, Ilha Solteira, SP, CP 31, 15385-000, Brazil;4. Instituto Agronômico de Campinas/IAC, Campinas, SP, CP 28, 13012-970, Brazil;1. Laboratory of Respiratory Biology, National Institute of Environmental Health Sciences, National Institutes of Health, Research Triangle Park, NC;5. Laboratory of Signal Transduction, National Institute of Environmental Health Sciences, National Institutes of Health, Research Triangle Park, NC;2. Department of Surgery, UMDNJ-Robert Wood Johnson Medical School, New Brunswick, NJ;3. Department of Medicine, Johns Hopkins University, Baltimore, Md;4. Department of Medicine, University of Washington, Seattle, Wash;1. Division of Maternal-Fetal Medicine, Department of Obstetrics and Gynecology, Northwestern University Feinberg School of Medicine, Chicago, IL;2. Northwestern University Feinberg School of Medicine, Chicago, IL |
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| Abstract: | Clonal variation and inter-character correlation of 11 seed characters were evaluated in 21 clones of Hevea brasiliensis. The characters were seed length, width, volume and weight, kernel and shell weight, and ratios of seed length/width, seed/kernel weight, seed/shell weight, kernel/shell weight and seed weight/volume. Clonal variation was evaluated through analysis of variance, F-test and least significant difference. Inter-character phenotypic correlation of clonal means was calculated. Genotypic correlation coefficients were estimated using genotypic variance and covariance obtained through analyses of variance and covariance respectively.There was significant clonal variation for each of the 11 seed characters with outstanding seed and kernel weights in PR 107. Significant phenotypic and genotypic correlation was obtained among six characters that are of importance to farmers and seed-millers. This means that selection can be applied on only one of the six characters for simultaneous improvement in the other desired characters. Among these characters, kernel weight had relatively high and consistent heritability estimate. Kernel weight will therefore be adequate for improvement and, hence, simultaneous improvement in the other five important seed characters (seed weight and ratios of seed/kernel weight, seed/shell weight, kernel/shell weight and seed weight/volume). |
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