Title: How does the nutritive quality of barley seeds affect development of the rice weevil (Sitophilus oryzae L.)?
Abstract:The rice weevil, Sitophilus oryzae (L.) is a primary pest of cereals, with growing importance. In the last few years, it represents a limiting factor in a post-harvest storage of small grains in Serbi...The rice weevil, Sitophilus oryzae (L.) is a primary pest of cereals, with growing importance. In the last few years, it represents a limiting factor in a post-harvest storage of small grains in Serbia. It has strong preference for wheat, but damages barley grains at certain extent as well. As differences in susceptibility of barley genotypes to the weevil attack have been recorded, it is of great interest to define seed traits responsible for tolerance, so as to be able to differentiate suitable and/or tolerant varieties. Genetic potential to resist storage pests is crucial to minimize quantitative and qualitative grain losses during storage. Thus, further knowledge on the tolerance of a specific genotype, is important for improving pest management programs and developing new breeding strategies. The aim of the study was to: i) identify tolerance potential of barley varieties by testing suitability of 27 barley genotypes for the rice weevil development, ii) in correlation with nutritional traits, and to iii) identify the quantity loss of barley seeds. We monitored weevil progeny production (number of newly emerged adults) after one, two and three generations and feeding intensity (% of consumed grains) after three generations (~ 90 days), in a "no-choice" under controlled conditions. Nutritive traits such as protein, starch and fibre content (%) were determined using NIR analyser. Among tested varieties, NS Talos, Novosadski 331, Novosadski 525, NS Golijat, Nonius, NS Lala, NS Mile and NS Marko revealed good suitability for the rice weevil development, both in terms of progeny production and feeding intensity. On the other hand, varieties NS Parip, NS Izdan, NS Deran, NS Brka, Novosadski 565 and NS Asteriks showed lower suitability for the weevil development (progeny production) and feeding. The rice weevil caused 2.5-62.0% losses of barley seeds, which indicates a significant difference in genotypes tolerance to the weevil attack. NIR analysis detected significant differences in fibre content that was negatively correlated with feeding intensity and starch content that was in positive correlation with the mentioned trait. In generally, varieties that manifested tolerance potential to this pest should be considered in future breeding programs.Read More
Publication Year: 2024
Publication Date: 2024-01-01
Language: en
Type: article
Indexed In: ['crossref']
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