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Developing japonica rice introgression lines with multiple resistance genes for brown planthopper, bacterial blight, rice blast, and rice stripe virus using molecular breeding

Abstract

Yield losses as a result of biotic stresses by fungi, bacteria, viruses, and insects are a key challenge in most rice cultivation areas. The development of resistant cultivars is considered an efficient and sustainable approach to mitigate rice yield reduction. In the present study, we describe the development of japonica rice introgression lines with multiple resistance genes (MR lines), resistant to four different types of biotic stresses, and compare the agronomic performance, yield, and grain quality parameters of these lines with those of the recurrent parent. A total of nine MR lines were developed by marker-assisted backcrossing, which combined five single-R genes in a japonica background with a minimum of linkage drag. All the MR lines harbored the R genes Bph18 and qSTV11SG and two Pi genes (Pib + Pik) in common, offering resistance to brown planthopper (BPH), rice stripe virus (RSV), and rice blast disease, respectively. In the case of bacterial blight (BB), Xa40 was detected in only five out of the nine and Xa3 was validated in the others. In particular, the five MR lines pyramiding the R genes (Bph18 + qSTV11SG + Pib + Pik) in combination with Xa40 showed stable resistance to all bioassays for BPH, BB, blast, and RSV. The MR lines did not show any negative effects on the main agronomic traits, including yield production and rice grain quality. The lines have significant potential to stabilize rice yield and minimize production costs in disease and pest-prone areas in Korea, through the pyramiding of five R genes using a marker-assisted backcrossing strategy.

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Abbreviations

ADV:

Alkali digestion value

BB:

Disease bacterial blight

BPH:

Brown planthopper

CL:

Culm length

DH:

Days to heading

GW:

Grain weight (GW)

MAS:

Marker-assisted selection

NGP:

Number of filled grains per panicle

NP:

Number of panicles

PL:

Panicle length

RP:

Recurrent parent

RGSV:

Rice grassy stunt virus

RRSV:

Rice ragged stunt virus

RSV:

Rice stripe virus

SS:

Seed set rate

Xoo:

Xanthomonas oryzae pv. oryzae

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Acknowledgements

This research was based on germplasm developed by Dr. K.K. Jena and was supported in part by a grant to the Agenda Program (Code No. PJ00926202), the Temperate Rice Research Consortium (TRRC) of the Rural Development Administration, Republic of Korea, and the Global Rice Science Partnership (GRiSP) program of IRRI. We thank the IRRI communication team for carefully editing the manuscript.

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Correspondence to Russell Reinke.

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The authors declare that there are no conflicts of interest.

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This article does not contain any studies with human participants or animals performed by any of the authors.

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Communicated by S. Hohmann.

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Reinke, R., Kim, SM. & Kim, BK. Developing japonica rice introgression lines with multiple resistance genes for brown planthopper, bacterial blight, rice blast, and rice stripe virus using molecular breeding. Mol Genet Genomics 293, 1565–1575 (2018). https://doi.org/10.1007/s00438-018-1470-1

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  • DOI: https://doi.org/10.1007/s00438-018-1470-1

Keywords

  • Multiple resistance genes
  • Biotic stress
  • Gene pyramiding
  • Japonica rice
  • Marker-assisted selection