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- W2355884348 abstract "[Objective]The heredity stability of Oryza rufipogon resistance to brown plant hopper was studied to screen wild rice germplasm with stable resistance for providing sources in breeding resistant rice varieties.[Method]Total 1591 accessions of Oryza rufipogon,collected from 46 proterozoic growth locations of Guangxi,were screened for brown plant hopper resistance and the genetic homozygosis in their offsprings was detected using bag-selfing or anther culture methods.[Result]The results showed that most of Oryza rufipogon germplasm accessions were heterozygotic and the growth habit and awn of their self F1 generation showed separation.Among 1591 germplasm accessions,only 30 showed 3r d-5t h grades of resistance to brown plant hopper,most of them showed 5t h grade.Among self offsprings of 11 resistant accessions,the Z1-Z3 showed separation of resistant genes,while some accessions showed stable resistance in Z4.Out of 11 accessions,resistance of 5 accessions increased from 3r d to 1s t-3t h grades,4 accessions from 5t h to 1s t-3r d grades and 2 accessions from 5t h to 3r d grade.The anther culture of 2174 material showed induction of callus in 125 accessions from 6000 anthers.They were differentiated in 8 clusters of diploid and 2 clusters of haploid with 2.0% induction rate and 6.4% differentiation rate.Out of 8 offspring of anther culture,6 showed 5t h grade of resistance to brown plant hopper and 2 plants showed 3r d grade resistance.[Conclusion]The stable highly-resistant resources could be obtained and resistance level of Oryza rufipogon could be enhanced through bag-selfing and multi-generation identification of resistance to brown plant hopper.Anther culture is beneficial to promote the genetic homozygosis of Oryza rufipogon resistance to brown plant hopper and shorten homozygosis time." @default.
- W2355884348 created "2016-06-24" @default.
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- W2355884348 date "2012-01-01" @default.
- W2355884348 modified "2023-09-28" @default.
- W2355884348 title "Genetic homozygosis of Oryza rufipogon resistance to brown plant hopper" @default.
- W2355884348 hasPublicationYear "2012" @default.
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