A Brown Planthopper Resistant and High Grain Quality Rice Variety ‘Anmi’ Developed by Molecular Breeding Method

Abstract

Anmi' is a new BPH (Brown planthopper) resistant japonica rice cultivar possessing the Bph18 gene derived from wild rice, Oryza australiensis and high yield potential with good grain quality. 'Anmi' was derived from a cross 'Junam' and 'IR65482-7-216-1-2' by a molecular marker assisted backcross breeding. The introgression line 'IR65482-7-216-1-2', the source of the Bph18 gene, was used as the donor parent for BPH resistance and 'Junam', a BPH-susceptible elite japonica cultivar with good grain quality, was used as the recurrent parent. 'Anmi' was developed by three times backcross the F1 plants with 'Junam'. The heading date of 'Anmi' is August 15 in central plain area, which is 5 days later than that of 'Hwaseong'. It has 77 cm in culm length, 21 cm in panicle length. The number of spikelets per panicle is more than that of 'Hwaseong' and 1,000 grain-weight of brown rice is 22.1 g which is less than 22.7 g of 'Hwaseong'. Milled rice kernel of 'Anmi' is clear in appearance, low in amylase content and excellent in palatability of cooked rice. 'Anmi' shows resistance to BPH, leaf blast disease, bacterial blight, rice stripe disease but susceptible to other virus disease and insect pest. The milled rice yield performance of 'Anmi' is about 5.76 MT/ha in local adaptability test for three years. This cultivar is adaptable to central plain area of Korea.

QTL Mapping of Grain Quality Traits Using Introgression Lines Carrying Oryza rufipogon Chromosome Segments in Japonica Rice

“…The program to transfer useful genes from wild rice into cultivated counterparts is active and aims to increase yield, yield stability, and crop genetic diversity (Brar and Khush 1997; Xie et al 2008; Suh et al 2014). However, efforts to improve rice quality of modern cultivars using wild rice as donor parents are limited.…”

“…Numerous genes conferring resistance to diseases and insect pests have been identified in wild species (Brar and Khush 1997; Suh et al 2014). ‘Anmi’ is a new BPH (Brown planthopper) resistant japonica rice cultivar possessing the Bph18 gene derived from wild rice, Oryza australiensis and high yield potential with good grain quality (Suh et al 2014). These results suggest that rice productivity and stability would be improved by transferring the useful gene from wild rice into the cultivar.…”

GWAS analysis reveals the genetic basis of blast resistance associated with heading date in rice

“…IR24 (unpublished). Additionally, Anmi was developed by firstly transferring an introgression line derived from wild rice, O. australiensis ( Bph18 donor), to the japonica background of Jinbubyeo, then crossing with Junam, an elite japonica cultivar with good grain quality ( Suh et al., 2014 ). Therefore, despite the narrow genetic diversity, a wide range of phenotypic variation has been observed among various agronomic traits of Korean rice cultivars ( Mo et al., 2020 ; Lee et al., 2023 ).…”

Identification of F3H, Major Secondary Metabolite-Related Gene That Confers Resistance against Whitebacked Planthopper through QTL Mapping in Rice

“…Currently, in the case of South Korea, WBPH control depends on chemicals, but it is difficult to detect WBPH damage at an early stage. Since spraying of agrochemicals in a state where the degree of damage is clearly indicated already missed the optimal time for recovery of damage, it is difficult to control WBPH only with agrochemical control, so the development of WBPH resistant cultivar is required [ 7 , 8 , 9 , 10 ]. The incidence of WBPH has increased in China and Vietnam, and a new kind of SRBSDV has been discovered [ 11 ].…”