Differential preference of grain of landrace and commercial rice genotypes to Sitophilus oryzae (L.) (Coleoptera: Curculionidae) attack

IF 2.7 2区 农林科学 Q1 ENTOMOLOGY
Kamal Ravi Sharma , S.V.S. Raju , Sameer Kumar Singh , Rashmirekha Singh , Rajendran Dhanapal , Rakesh Kumar
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Abstract

The rice weevil, Sitophilus oryzae L. (Coleoptera: Curculionidae), is one of the most damaging pests to stored cereal grains worldwide. The current study aimed to clarify the relationship between S. oryzae development and the governing physicochemical grain properties. Laboratory experiments were conducted to determine the grain preference of various landrace and commercial rice genotypes to rice weevil. S. oryzae, findings divulged the low rates of adult emergence, low rates of grain consumption and high rates of mortality in the grain of rice varieties, HUR-3022 and Nagina-22. Conversely, S. oryzae adult emergence and grain consumption were found to be high in the grain of Swarna, Sathi, and Pusa basmati-1. Interestingly, the morphological and biochemical composition of the grain was the most important factor in determining resistant or preferred rice varieties to S. oryzae. Among the various physical characteristics investigated, grain hardness was found to have a significant and negative correlation with alive insect, grain weight loss, and preference index. On the other hand, protein and other biochemical grain characteristics were found to have a positive correlation with insect emergence, weight loss, and preference index. In particular, amylose (a key grain component) was found to have a negative correlation with weight loss and insect emergence. The findings of this study suggest that screening of different rice genotypes, for determining grain preference, may be a more viable option to minimize the grain losses during storage caused by S. oryzae. Moreover, the findings of present study could also help to formulate the breeding programs aimed at developing cultivars resistant to this notorious pest.

陆稻和商品稻基因型的谷粒对鞘翅目:稻壳虫科(Sitophilus oryzae (L.))虫害的偏好差异
稻象鼻虫(鞘翅目:蝼蛄)是世界上对储藏谷物危害最大的害虫之一。本研究旨在阐明稻象鼻虫的发展与谷物理化特性之间的关系。通过实验室实验确定了各种陆稻和商品稻基因型对稻象甲的谷粒偏好。研究结果表明,成虫出现率低,谷粒消耗率低,HUR-3022 和 Nagina-22 稻种谷粒的死亡率高。相反,Swarna、Sathi 和 Pusa basmati-1 谷粒中的 S. oryzae 成虫出现率和谷粒消耗率较高。有趣的是,谷粒的形态和生化成分是决定水稻品种对 S. oryzae 的抗性或偏好的最重要因素。在调查的各种物理特性中,谷粒硬度与活虫、谷粒失重和偏好指数呈显著负相关。另一方面,蛋白质和谷物的其他生化特征与昆虫出现、谷物失重和偏好指数呈正相关。尤其是直链淀粉(谷物的主要成分)与失重和昆虫出苗呈负相关。本研究的结果表明,筛选不同的水稻基因型以确定谷物偏好性,可能是一种更可行的选择,可最大限度地减少谷物在储藏期间由 S. oryzae 造成的损失。此外,本研究的结果还有助于制定育种计划,开发出能抵抗这种臭名昭著的害虫的品种。
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来源期刊
CiteScore
5.70
自引率
18.50%
发文量
112
审稿时长
45 days
期刊介绍: The Journal of Stored Products Research provides an international medium for the publication of both reviews and original results from laboratory and field studies on the preservation and safety of stored products, notably food stocks, covering storage-related problems from the producer through the supply chain to the consumer. Stored products are characterised by having relatively low moisture content and include raw and semi-processed foods, animal feedstuffs, and a range of other durable items, including materials such as clothing or museum artefacts.
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