Genetic and environmental variance components in guava fruit qualities |
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| Affiliation: | 1. School of Biotechnology and Food Engineering, Hefei University of Technology, Hefei 230009, China;2. U.S. Department of Agriculture-Agricultural Research Service (USDA-ARS), 2217 Wiltshire Road, Kearneysville, WV 25430, USA;1. Department of Fruit Science, Punjab Agricultural University, Ludhiana, India;2. College of Agriculture, Punjab Agricultural University, Ludhiana, India;3. Punjab Horticultural Postharvest Technology Centre, Ludhiana, India;4. Professor, Department of Plant Agriculture, University of Guelph, Canada;5. Punjab Agricultural University, Regional Station, Bhadurgarh, Patiala, India;1. School of Biological Sciences and ARC Training Centre for Forest Value, University of Tasmania, Private Bag 55, Hobart, Tasmania 7001, Australia;2. Plant Breeding Institute, Faculty of Agriculture & Environment, University of Sydney, Australia;3. Forestry Tasmania, Hobart, Tasmania, Australia;4. School of Agricultural Science, University of Tasmania, Hobart, Tasmania 7001, Australia;1. Food Technology Department, Lleida University, XaRTA-Postharvest, Agrotecnio Center, Rovira Roure 191, 25198 Lleida, Catalonia, Spain;2. IRTA, XaRTA-Postharvest, Scientific and Technologic Parc of Gardeny, FRUITCENTRE building, 25003 Lleida, Catalonia, Spain;3. INRA, UMR1065 Santé & Agroécologie du VignoblE, ISVV, Université de Bordeaux, CS 20032, 33882 Villenave d''Ornon cédèx, France;1. Department of Horticultural Science, Mokpo National University, Muan, Jeonnam, South Korea;2. Regional Crop Research Institute, Mokpo National University, Jeonnam, South Korea;3. Pear Research Station, National Institute of Horticultural & Herbal Science, Naju 520-821, South Korea;4. Warsaw University of Life Sciences (SGGW), Faculty of Veterinary Medicine, Department of Physiological Sciences, Warsaw, Poland;5. Food Research Institute, 824 75 Bratislava, Slovakia;6. The Institute for Drug Research, School of Pharmacy, The Hebrew University, Hadassah Medical School, Jerusalem 91120, Israel |
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| Abstract: | The proportion of genetic and environmental variances for fruit weight (FW), flesh thickness (FLT), flesh weight (FLW), fruit firmness (FF), seed cavity weight (SCW), total soluble solids (TSS), titratable acidity (TA), juice acidity (pH), and ascorbic acid (AA) in guava were estimated with eight genotypes, four trees per genotype, and five fruits per tree for two seasons. The variance components of the fruit traits were consisted of genotypic variance (4.2–65.1%), seasonal variance (0–61.0%), genotype by season interaction variance (2.0–17.0%), among trees within genotype variance (0–4.2%), tree by season interaction variance (0–7.4%), and among fruit within tree variance (19.0–50.7%). A high proportion of genotypic variance was found with FW, FLT, FLW, SCW, and AA indicating that genetic improvement for these traits through breeding and selection was achievable. Seasonal variance was high for pH, while among fruits within tree variance was greatest for FF, TA, and TSS. The traits which were high in either season were more difficult to improve genetically. |
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