棉属及相关植物对肾形肾线虫的抗性种质
Resistant Germplasm in Gossypium Species and Related Plants to Rotylenchulus reniformis.
作者信息
Yik C P, Birchfield W
出版信息
J Nematol. 1984 Apr;16(2):146-53.
Gossypium hirsutum, G. herbaceum, G. arboreum, G. barbadense, wild Gossypium spp., Hibiscus spp, and other Malvaceae were tested in the greenhouse to identify germplasm resistant to Rotylenchulus reniformis (Rr). Host resistance was based on Rr egg production per gram of root compared with known G. hirsutum susceptible 'Deltapine 16' as check. G. longicalyx and Sida rhombifolia were nonhosts. High levels of resistance were found in G. stocksii, G. somalense, and G. barbadense 'Texas 110.' Other cotton lines with potential value in breeding for Rr resistance were G. herbaceum P.I. 408775; G. arboreum P.I. 41895, P.I, 417891, CB 3839; and G. hirsutum 893. All these supported less than 20% of the egg production on the check. Seventy-three percent of the Hibiscus spp. tested were resistant. Female development and egg production reflected host resistance; healthy females and large egg masses were observed on susceptible plants, and degenerated females and small egg masses on resistant plants. Females penetrating nonhost G. longicalyx never matured to kidney shape.
在温室中对陆地棉、草棉、树棉、海岛棉、野生棉属物种、木槿属物种以及其他锦葵科植物进行了测试，以鉴定对肾形肾线虫（Rr）具有抗性的种质。寄主抗性基于每克根上的Rr产蛋量，并与已知的陆地棉感病品种“三角洲松树16号”作为对照进行比较。长萼棉和菱叶黄花稔是非寄主。在斯托克西棉、索马里棉和海岛棉“德克萨斯110号”中发现了高水平的抗性。在抗Rr育种中具有潜在价值的其他棉花品系有草棉P.I. 408775；树棉P.I. 41895、P.I. 417891、CB 3839；以及陆地棉893。所有这些品系上的产蛋量均不到对照的20%。所测试的木槿属物种中有73%具有抗性。雌虫发育和产蛋量反映了寄主抗性；在感病植株上观察到健康的雌虫和大的卵块，而在抗性植株上则是退化的雌虫和小的卵块。侵入非寄主长萼棉的雌虫从未发育到肾形。
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