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- W2362310439 abstract "The resistance of Chinese japonica rice Chunjiang 06 (CJ-06) to the whitebacked planthopper (WBPH), Sogatella furcifera, was studied in compared with the susceptible hybrid rice Shanyou 63 (SY-63). Results showed that CJ-06 was highly resistant to WBPH. WBPH immigrants rejected to land and failed to establish colonies on CJ-06, while they preferred to settle and well reproduced on SY-63. Under a free-choice experimental condition, significantly fewer WBPHs alighted on CJ-06 than on SY-63. A WBPH female excreted only 4.8 mg honeydew per day on CJ-06, while 17.4 mg on SY-63, indicating a significantly suppressed sucking activity of WBPH on CJ-06. Both fecundity and egg hatchability were markedly reduced on CJ-06, when newly emerged WBPH females continuously fed and were allowed to oviposit in it. Average number of eggs laid in CJ-06 and SY-63 was 42.4 and 133.6, and percentage of egg hatchability was 20.1% and 64.5%, respectively. Consequently, the number of nymphs hatched on CJ-06 amounted to only about one-tenth of that on SY-63. WBPH eggs showed a high mortality in watery lesions at oviposition sites of CJ-06. The watery lesions rapidly led to the formation of conspicuous necrotic symptoms before the eggs hatched. The egg mortality occurred within 1-2 days after oviposition. Such watery lesions seldom occurred on SY-63, where the eggs hatched normally. Based on the above findings, it was concluded that sucking inhibition and ovicidal reaction were critical factors for WBPH resistance in CJ-06. These functions were associated with the antixenosis mechanism against WBPH immigrants, as well as the antibiosis mechanism whereby fecundity and egg hatchability of inhabitants were reduced, respectively. Such dual mechanisms of varietal resistance could result in the stable and durable field resistance to WBPH in the Chinese japonica rice CJ-06." @default.
- W2362310439 created "2016-06-24" @default.
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- W2362310439 date "2003-01-01" @default.
- W2362310439 modified "2023-09-25" @default.
- W2362310439 title "Resistance to the Whitebacked Planthopper, Sogatella furcifera in Chinese Japonica Rice Chunjiang 06" @default.
- W2362310439 hasPublicationYear "2003" @default.
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