Abstract Landraces are used in breeding programs as a source of resistance and compose a small group of genetic materials accepted under organic seed production. The goal of this study was to evaluate the susceptibility of Brazilian landraces grains to the attack of Sitophilus zeamais. Ten different landraces were subjected to the attack of S. zeamais in choice and no-choice experiments. We evaluated the number of emerged insects and the weight reduction of the damaged grains. The Presidente Amarelo landrace received 4.4 and 5.4 times less insects than Colorado and Cateto in the choice experiment. Also, the Ligeirinho and Presidente Amarelo landrace provided the emergence of 4.2 times less adults than Cateto. The landraces presented different results when submitted to choice and no-choice experiments. However, Cateto grains presented the highest susceptibility to attack in both experiments. Presidente Amarelo, on the other hand, presented the highest resistance to the attack of S. zeamais and so might be considered to be used as a source of resistance in breeding programs.

中文翻译：

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巴西玉米地方品种对 Sitophilus zeamais（鞘翅目： Curculionidae）攻击的易感性

摘要 地方品种在育种计划中用作抗性来源，并构成有机种子生产中可接受的一小群遗传材料。本研究的目的是评估巴西地方品种谷物对 Sitophilus zeamais 攻击的敏感性。10 种不同的地方品种在选择和非选择实验中遭受了 S. zeamais 的攻击。我们评估了出现的昆虫数量和受损谷物的重量减轻情况。在选择实验中，Presidente Amarelo 地方品种收到的昆虫比科罗拉多州和 Cateto 少 4.4 倍和 5.4 倍。此外，Ligeirinho 和Presidente Amarelo 地方品种提供的成年品种比Cateto 少4.2 倍。地方品种在进行选择和非选择实验时呈现不同的结果。然而，Cateto 晶粒在两个实验中都表现出最高的易受攻击性。另一方面，Presidente Amarelo 对 S. zeamais 的攻击表现出最高的抵抗力，因此可以考虑将其用作育种计划中的抵抗力来源。