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首页> 外文期刊>Nematropica >PREVALENCE AND CHARACTERIZATION OF PLANT-PARASITIC NEMATODES IN LOWLAND AND UPLAND RICE AGRO-ECOSYSTEMS IN LUZON, PHILIPPINES
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PREVALENCE AND CHARACTERIZATION OF PLANT-PARASITIC NEMATODES IN LOWLAND AND UPLAND RICE AGRO-ECOSYSTEMS IN LUZON, PHILIPPINES

机译:PREVALENCE AND CHARACTERIZATION OF PLANT-PARASITIC NEMATODES IN LOWLAND AND UPLAND RICE AGRO-ECOSYSTEMS IN LUZON, PHILIPPINES

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摘要

The prevalence of plant-parasitic nematodes in lowland and upland rice ecosystems was compared based on soil and root samples from 30 rice fields in five provinces (Bataan, Batangas, Bulacan, Pampanga, and Pangasinan) of Luzon, Philippines. Five nematode genera (Meloidogyne, Hirschmanniella, Pratylenchus, Tylenchorhynchus, and Helicotylenchus) from lowland and nine genera (Rotylenchulus, Aphelenchoides, Criconematidae, Rotylenchus, and those found in lowland) from upland were identified. Meloidogyne graminicola was the most prevalent and abundant plant-parasitic nematode in both ecosystems. Hirschmanniella was the second most prevalent genus in lowland rice, but its density was low in upland rice. Pratylenchus was present in high densities, but was not widely distributed in either upland or lowland rice fields. The three most prevalent nematode species, M. graminicola, H. oryzae, and H. mucronata, were morphologically and molecularly characterized. Molecular analyses based on D2D3, ITS1-5.8-ITS2, and 18S rDNA regions generally showed an overall congruence, low intraspecific variation and agreement with classical morphological and morphometrical identifications.

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