Genetics, Molecular Mechanisms and Deployment of Bacterial Blight Resistance Genes in Rice

Pradhan, Sharat Kumar; Barik, Saumya Ranjan; Nayak, D. K.; Pandit, Elssa; Nayak, P.; Das, S. R.; Pathak, Himanshu

doi:10.1080/07352689.2020.1801559

Cited by 24 publications

(25 citation statements)

References 152 publications

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“…Previous reports of many successful gene transfer and pyramiding cases have been published in rice crop [47][48][49][50][51][52][53][54][55][56][57][58][59][60]. This study of QTL pyramiding for submergence tolerance and yield component QTLs is clearly different from earlier gene pyramiding work.…”

Section: Discussionmentioning

confidence: 77%

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Marker-Assisted Backcross Breeding for Improvement of Submergence Tolerance and Grain Yield in the Popular Rice Variety ‘Maudamani’

et al. 2021

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Submergence stress due to flash floods reduces rice yield drastically in sensitive varieties. Maudamani is a high yielding popular rice variety but is highly susceptible to submergence stress. The selection of progenies carrying Sub1 and GW5 (wide-grain) enhanced the submergence stress tolerance and grain yield of theMaudamani variety by following the marker-assisted backcross breeding method. Foreground screening detected 14 BC1F1, 17 BC2F1, and 12 BC3F1 backcross progenies that carried the target QTLs for submergence tolerance and grain width. Background screening was performed in the progenies carrying the target QTL and enhanced the recovery of a recipient parent’s genome by upto 96.875% in the BC3 pyramided line. The BC3F1 plant containing the highest recipient parent genome content and the target QTLs was self-pollinated. In BC3F2 generation, the target QTLs the Sub1 and GW5 (wide-grain) alleles and recipient parent’s yield component QTL OsSPL14 were tracked for homozygous states in the progenies. Seven pyramided lines showed tolerance to submergence for 14 days and higher grain yield than both the parents. The pyramided lines were similar to the recipient parent for the majority of the studied morphological and quality traits. The pyramided lines are useful as cultivars and can serve as potential donors for transfer of Sub1, OsSPL14, Gn1a, GW5 (wide-grain), and SCM2 QTLs.

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Section: Discussionmentioning

confidence: 77%

“…Work on gene pyramiding for the transfer of various traits in rice has been published earlier [48,[52][53][54][55]60]. By using this precision breeding for transfer of target traits, pyramids containing Sub1+ OsSPL14+ Gn1a + gw5 + SCM2 QTLs along with recipient parents' genome of >95% in the pyramided lines was possible.…”

Section: Discussionmentioning

confidence: 99%

Marker-Assisted Backcross Breeding for Improvement of Submergence Tolerance and Grain Yield in the Popular Rice Variety ‘Maudamani’

et al. 2021

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“…To date, 45 genes conferring resistance against BB, have been identified [ 22 , 23 , 24 ]. Among these resistance genes, 17 ( xa 5, xa 8, xa 13, xa 15, xa 19, xa 20, xa 24, xa 25, xa 26, xa 28, xa 31, xa 32, xa 33, xa 34, xa 41, xa 42 and xa 44) are recessive, while the remaining 28 are dominant [ 24 , 25 , 26 , 27 ].…”

Section: Introductionmentioning

confidence: 99%

Pyramiding of Four Broad Spectrum Bacterial Blight Resistance Genes in Cross Breeds of Basmati Rice

Ullah

Ali

Mahmood

et al. 2022

Plants

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Pyramiding of major resistance (R) genes through marker-assisted selection (MAS) is a useful way to attain durable and broad-spectrum resistance against Xanthomonas oryzae pv. oryzae pathogen, the causal agent of bacterial blight (BB) disease in rice (Oryza sativa L.). The present study was designed to pyramid four broad spectrum BB-R genes (Xa4, xa5, xa13 and Xa21) in the background of Basmati-385, an indica rice cultivar with much sought-after qualitative and quantitative grain traits. The cultivar, however, is susceptible to BB and was therefore, crossed with IRBB59 which possesses R genes xa5, xa13 and Xa21, to attain broad and durable resistance. A total of 19 F1 plants were obtained, some of which were backcrossed with Basmati-385 and large number of BC1F1 plants were obtained. In BC1F2 generation, 31 phenotypically superior genotypes having morphological features of Basmati-385, were selected and advanced up to BC1F6 population. Sequence-tagged site (STS)-based MAS was carried out and phenotypic selection was made in each successive generation. In BC1F6 population, potentially homozygous recombinant inbred lines (RILs) from each line were selected and evaluated on the bases of STS evaluation and resistance to local Xanthomonas oryzae pv. oryzae (Xoo) isolates. Line 23 was found pyramided with all four BB-R genes i.e., Xa4, xa5, xa13 and Xa21. Five genotypes including line 8, line 16, line 21, line 27 and line 28 were identified as pyramided with three R genes, Xa4, xa5 and xa13. Pathological study showed that rice lines pyramided with quadruplet or triplet R genes showed the highest level of resistance compared to doublet or singlet R genes. Thus, line 23 with quadruplet, and lines 8, 16, 21, 27, and 28 with triplet R genes, are recommended for replicated yield and resistance trials before release as new rice varieties. Further, traditional breeding coupled with MAS, is a solid way to attain highly effective BB-resistant rice lines with no yield cost.

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“…BB diseases in rice cause various types of damage throughout the rice growth period, and the degree of damage varies [ 10 ]. As the growth of rice progresses, the incidence of BB disease increases; the incidence is highest in the heading stage, and the degree of damage is severe [ 11 ]. In addition, because BB is also greatly influenced by the environment, more damage by BB disease occurs in tropical regions than in temperate regions, and yield losses of 2–74% occur in tropical regions depending on the cultivation period, environmental conditions, growth period and kind of cultivars [ 12 ].…”

Section: Introductionmentioning

confidence: 99%

Characterization and QTL Mapping of a Major Field Resistance Locus for Bacterial Blight in Rice

Park

Lee

et al. 2022

Plants

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Bacterial blight (BB) disease, caused by Xanthomonas oryzae pv. oryzae (Xoo), is among the major factors that can cause rice yields to decrease. To address BB disease, researchers have been looking for ways to change pesticides and cultivation methods, but developing resistant cultivars is the most effective method. However, the resistance and genetic factors of cultivars may be destroyed due to the emergence of new Xoo species caused by recent and rapid climate changes. Therefore, breeders need to identify resistance genes that can be sustained during unpredictable climate changes and utilized for breeding. Here, qBBR11, a quantitative trait locus (QTL) for resistance to BB disease, was detected in KJ (Korea Japonica varieties) 11_067 to KJ11_068 on chromosome 11 in a population derived by crossing JJ (Jeonju) 623 and HR(High resistant)27,195, which possess similar genetic backgrounds but different degrees of resistance to BB disease. qBBR11 was reduced from 18.49–18.69 Mbp of chromosome 11 to 200 kbp segment franked. In this region, 16 candidate genes were detected, and we identified 24 moderate-impact variations and four high-impact variations. In particular, high-impact variations were detected in Os11g0517800 which encode the domain region of GCN2 which is the eIF-2-alpha kinase associated with the resistance of abiotic/biotic stress in rice. In JJ623, which is moderately resistant to BB disease, a stop codon was created due to single nucleotide polymorphism (SNP). Therefore, compared with HR27195, JJ623 has weaker resistance to BB disease, though the two have similar genetic backgrounds. The results suggest that variation in the qBBR11 region regulates an important role in improving resistance to BB diseases, and qBBR11 is useful in providing an important resource for marker-assisted selection to improve mechanisms of resistance to BB disease.

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Genetics, Molecular Mechanisms and Deployment of Bacterial Blight Resistance Genes in Rice

Cited by 24 publications

References 152 publications

Marker-Assisted Backcross Breeding for Improvement of Submergence Tolerance and Grain Yield in the Popular Rice Variety ‘Maudamani’

Marker-Assisted Backcross Breeding for Improvement of Submergence Tolerance and Grain Yield in the Popular Rice Variety ‘Maudamani’

Pyramiding of Four Broad Spectrum Bacterial Blight Resistance Genes in Cross Breeds of Basmati Rice

Characterization and QTL Mapping of a Major Field Resistance Locus for Bacterial Blight in Rice

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