Correlation between biophysical seed characteristics of rice bean,Vigna umbellata (Fabaceae: Faboideae: Phaseoleae) and the development of Callosobruchus maculatus (Coleoptera: Chrysomelidae: Bruchinae) |
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| Affiliation: | 1. Facultad de Agronomía de Azul, UNCPBA, Av. República de Italia #780, 7300, Azul, Buenos Aires, Argentina;2. Centro de Investigaciones Integradas sobre Sistemas Agronómicos Sustentables (CIISAS). Facultad de Agronomía, UNCPBA, Av. República de Italia #780, 7300, Azul, Buenos Aires, Argentina;3. Laboratorio de Biología Funcional y Biotecnología (BIOLAB)-INBIOTEC-CONICET-CICPBA, Facultad de Agronomía, UNCPBA, Av. República de Italia #780, 7300, Azul, Buenos Aires, Argentina;1. School of Studies in Biotechnology, Jiwaji University, Gwalior, India;2. Department of Bioscience & Biotechnology, Banasthali Vidhyapeeth, Banasthali, India;1. Centro de Ciências Biológicas e da Natureza, Universidade Federal de Acre, Rio Branco, AC 69915-900, Brazil;2. Departamento de Engenharia Agrícola, Universidade Federal de Viçosa, Viçosa, MG 36579-900, Brazil;3. Campus Codó, Instituto Federal do Maranhão, Codó, MA 36693-000, Brazil;1. Department of Agricultural Engineering, Universidade Federal de Viçosa, Viçosa, MG, Brazil;2. Center for Biology and Nature Sciences, Universidade Federal do Acre, Rio Branco, AC, Brazil |
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| Abstract: | The bruchid, Callosobruchus maculatus is a serious pest of stored pulses. Four biophysical seed characteristics viz. Seed size, texture of seed surface, thickness of seed coat and seed hardness of 10 genotypes of rice bean, a wild pulse crop were investigated for assessing mechanism of resistance against C. maculatus. Oviposition preference and larval penetration in seed coat did not differ significantly among different test genotypes. Highest number of larvae which developed up to last larval/pupal instar were observed in susceptible check variety of mungbean, PAU 911 (30.00) and lowest in rice bean genotype, LRB 535 (0.83). Highest and lowest seed weight was noticed in rice bean genotype, LRB 529 (6.81 g) and PAU 911 (3.88 g), respectively. Almost similar seed coat thickness was recorded among different test genotypes. Maximum seed hardness was noted in genotype LRB 507 (6.45 kg) whereas minimum in PAU 911 (2.00 kg) among all test genotypes. Any remarkable correlation of biophysical seed characteristics of test genotypes with ovipositon, larval penetration and development of C. maculatus was not observed. Thus, biophysical seed characteristics of rice bean did not suggest to play a vital role in imparting resistance against C. maculatus. |
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| Keywords: | Biophysical Resistance |
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