McLoud Laura Ann, Hague Steven, Knutson Allen, Wayne Smith C, Brewer Michael
Department of Soil and Crop Sciences, Texas A&M University, 370 Olsen Blvd., TAMU 2474, College Station, TX 77843, (
Department of Entomology, Texas A&M AgriLife Research and Extension Center, 17360 Coit Rd., Dallas, TX 75252 and.
J Econ Entomol. 2016 Feb;109(1):392-8. doi: 10.1093/jee/tov275. Epub 2015 Oct 16.
Cotton fleahopper, Pseudatomoscelis seriatus (Reuter) (Hemiptera: Miridae), is a piercing-sucking pest of cotton (Gossypium hirsutum L.) that feeds preferentially on developing flower buds, called squares. Heavy infestations cause yield reductions that result from abscission of squares damaged by the cotton fleahopper feeding. Antixenosis, or nonpreference, has been reported as a mechanism of host plant resistance in cotton to cotton fleahopper. Square structure, particularly the placement of the reproductive tissues, and stylet penetration were investigated as factors that influence resistance to cotton fleahopper in cotton lines derived from crosses with Pilose, a cultigen of upland cotton resistant to cotton fleahopper, and backcrossed with high-yielding, susceptible lines. Ovary depth varied among the lines tested and was found to be a heritable trait that affected the ability of a fleahopper's feeding stylets to penetrate the reproductive tissues in the square and might influence preference. Behavioral assays suggested antixenosis as a mechanism of host plant resistance, and the trait conferring antixenosis was found to be heritable. Results suggest ovary depth plays a role in conferring resistance to cotton fleahopper and is an exploitable trait in resistance breeding.
棉盲蝽，即伪盲蝽（Reuter）（半翅目：盲蝽科），是棉花（陆地棉）的一种刺吸式害虫，它优先取食发育中的花蕾，即棉蕾。严重的虫害会导致产量下降，这是由棉盲蝽取食造成的棉蕾脱落所致。抗生性，即不偏好性，已被报道为棉花对棉盲蝽的一种寄主植物抗性机制。研究了棉蕾结构，特别是生殖组织的位置以及口针穿刺情况，作为影响源自与多毛棉（一种对棉盲蝽具有抗性的陆地棉栽培品种）杂交并与高产、感虫品系回交的棉花品系对棉盲蝽抗性的因素。在所测试的品系中，子房深度各不相同，并且发现这是一种可遗传的性状，它影响盲蝽取食口针穿透棉蕾中生殖组织的能力，可能还会影响偏好性。行为测定表明抗生性是寄主植物抗性的一种机制，并且赋予抗生性的性状是可遗传的。结果表明子房深度在赋予对棉盲蝽的抗性方面发挥作用，并且是抗性育种中一个可利用的性状。
