High-resolution genetic mapping of a novel bacterial blight resistance gene xa-45(t) identified from Oryza glaberrima and transferred to Oryza sativa

Neelam, Kumari; Mahajan, Ritu; Gupta, Vikas; Bhatia, Dharminder; Gill, B. S.; Rajpura, Komal; Lore, Jagjeet Singh; Mangat, Gurjit Singh; Singh, Kuldip

doi:10.1007/s00122-019-03501-2

Cited by 66 publications

(41 citation statements)

References 89 publications

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“…To date, approximately 45 resistance ( R ) genes conferring resistance against BB have been identified using diverse rice sources ( Neelam et al, 2020 ). However, only eleven of these R genes, exhibiting multiple mechanisms of R -gene-mediated Xoo resistance, have been cloned and functionally analyzed ( Song et al, 1995 ; Yoshimura et al, 1998 ; Iyer and McCouch, 2004 ; Sun et al, 2004 ; Gu et al, 2005 ; Chu et al, 2006 ; Liu et al, 2011 ; Tian et al, 2014 ; Hutin et al, 2015 ; Wang et al, 2015 ; Hu et al, 2017 ).…”

Section: Introductionmentioning

confidence: 99%

Distribution of Bacterial Blight Resistance Genes in the Main Cultivars and Application of Xa23 in Rice Breeding

Wang

Liu

et al. 2020

Front. Plant Sci.

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Bacterial blight (BB) is an important constraint on achieving a high and stable rice grain yield. An increasing number of BB resistance ( R ) genes have been identified and cloned to increase the available options for rice disease resistance breeding. However, it is necessary to understand the distribution of R genes in rice varieties for rational distribution and breeding. Here, we genotyped five R genes, i.e. Xa4 , Xa7 , Xa21 , Xa23 , and Xa27 , in seventy main cultivars from Guangdong Province, South China using the corresponding specific markers. Our results showed that 61 varieties carried Xa4 , only three varieties carried Xa27 , and Xa7 , Xa21 , or Xa23 was not detected in all tested varieties. Notably, only 33 varieties exhibited resistance to pathotype IV Xoo strains. These results indicate that Xa4 is no longer suitable for widespread use in rice breeding, although Xa4 is widely present in tested varieties. Remarkably, the strongly virulent BB strains of pathotype IX evolved quickly in southern China, and Xa23 was found to effectively confer resistance against the pathotype IX strains. Subsequently, we successfully bred two novel inbred rice varieties as also being restorer lines and two photoperiod- and thermo-sensitive genic male sterility (P/TGMS) lines using the broad-spectrum resistance gene Xa23 through marker-assisted selection (MAS) combined with phenotypic selection. All of the developed lines and derived hybrids exhibited enhanced resistance to BB with excellent yield performance. Our research may potentially facilitate both of the inbred and hybrid rice disease resistance breeding.

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Section: Introductionmentioning

confidence: 99%

Distribution of Bacterial Blight Resistance Genes in the Main Cultivars and Application of Xa23 in Rice Breeding

Wang

Liu

et al. 2020

Front. Plant Sci.

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“…Presence of several virulent bacterial strains in the rice growing areas throughout the world necesssitates cultivation of such rice varieties, which are endowed with multiple resistance genes as gene-pyramids. To date, identification of 44 R genes conferring resistance to diverse Xoo races has been completed (Busungu et al, 2016;Neelam et al, 2019); majority of these identified genes come from O. sativa ssp. indica or japonica.…”

Section: Modern Approaches For Development Of Bb Resistant Rice Molecmentioning

confidence: 99%

Deployment of Genetic and Genomic Tools Toward Gaining a Better Understanding of Rice-Xanthomonasoryzae pv. oryzae Interactions for Development of Durable Bacterial Blight Resistant Rice

Kumar

Sengupta

et al. 2020

Front. Plant Sci.

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“…This might be due to the partial grain filling resulted from low photosynthetic activity [23]. Out of already identified 45 BLB resistant (R) genes, 11 genes have been fine mapped and cloned till date applying modern biotechnological [24][25][26][27]. The marker-assisted pyramiding approach was applied to pyramid four BLB resistant genes; Xa4, xa5, xa13 and Xa21 in background of high yielding rice varieties to achieve wider and durable resistance [28][29][30][31].…”

Section: Introductionmentioning

confidence: 99%

Advances in Developing Multigene Abiotic and Biotic Stress-Tolerant Rice Varieties

Sandhu¹,

Yadav²,

Kumar³

2021

Abiotic Stress in Plants

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Increasing incidences of multiple abiotic stresses together with increasing population are the major constraints to attain the global food security. Rice, the major staple food crop is very much prone to various abiotic and biotic stresses, which can occur one at a time or two or more together in a single crop growing season and adversely affects the rice production and productivity. The devastating effect of multiple stresses on rice crop is much more erratic and complex leading to higher losses in the crop grain yield. The concurrent occurrence of multiple streeses can destroy rice production in many of the rainfed areas of South and Southeast-Asia. Genomics-assisted breeding strategies have been instrumental in introgression of various major effect QTLs/genes into rice mega varieties and have proven successful in achieving the desired level of tolerance/resistance to various abiotic stresses in diffferent crop species. Keeping the present scenario of changing climate in mind, the chapter discusses the recent past success in combining tolerance to two or more abiotic stresses in mega rice varieties applying genomics-assisted breeding and development of high-yielding climate resilient rice through stacking of multiple genes/QTLs, which can withstand in a cascade of multiple stresses occurring regularly in rainfed environments.

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High-resolution genetic mapping of a novel bacterial blight resistance gene xa-45(t) identified from Oryza glaberrima and transferred to Oryza sativa

Cited by 66 publications

References 89 publications

Distribution of Bacterial Blight Resistance Genes in the Main Cultivars and Application of Xa23 in Rice Breeding

Distribution of Bacterial Blight Resistance Genes in the Main Cultivars and Application of Xa23 in Rice Breeding

Deployment of Genetic and Genomic Tools Toward Gaining a Better Understanding of Rice-Xanthomonasoryzae pv. oryzae Interactions for Development of Durable Bacterial Blight Resistant Rice

Advances in Developing Multigene Abiotic and Biotic Stress-Tolerant Rice Varieties

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