Breeding strategies for hybrid rice parental line improvement

Prasad, A.; Senguttuvel, P.; Revathi, P.; Kb, Kemparaju; Sruthi, K.; Sundaram, R. M.; Madhav, Mukund; Prasad, G. Durga; Gs, Laha

doi:10.5958/2249-5266.2018.00004.8

Cited by 6 publications

(2 citation statements)

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“…The efficiency of the gene in giving a high level of resistance was demonstrated in a previous study that was conducted by Balachiranjeevi et al (2015) [3] . According to the findings of Prasad et al (2011) [17] , Samba Mahsuri breeding lines that included the gene showed a high level of resistance to blast diseases in trials conducted in many locations. When compared to the original parent, Swarna, the improved cultivars of Swarna had much better levels of resistance to bacterial leaf blight and blast.…”

Section: Phenotypic Screening For Blast Resistancementioning

confidence: 99%

Screening of high-yielding Swarna lines developed through MABB for resistance against bacterial blight and blast diseases

Kousik,

Punniakotti,

Rekha

et al. 2024

Int. J. Adv. Biochem. Res.

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Rice cultivation has two significant challenges: BB and blast diseases. There are a number of Indian rice variety that are extremely sensitive to these diseases, one of which is the well-known Swarna mega-rice variety. The resistance genes Xa21 and Pi54, which provide protection against bacterial blight (BB) and blast diseases, were incorporated into a Near Isogenic Line (NIL) of Swarna that already had the yield-boosting gene OsSPL14 using marker-assisted backcross breeding. Ten best introgressed lines were selected at the ICF6 stage and subjected to phenotypic screening in a standardized blast nursery to evaluate resistance to blast disease and under controlled conditions for bacterial leaf blight. The lines exhibited outstanding performance and showed good tolerance to biotic stresses such as bacterial blight and blast.

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Section: Phenotypic Screening For Blast Resistancementioning

confidence: 99%

Screening of high-yielding Swarna lines developed through MABB for resistance against bacterial blight and blast diseases

Kousik,

Punniakotti,

Rekha

et al. 2024

Int. J. Adv. Biochem. Res.

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“…Few varieties of tropical japonica having good compatibility, showed normal fertility in F 1 . Recently hybrid rice breeders made research efforts concentrated on breeding parental lines from indica-tropical japonica crosses to raise heterosis level and increase the genetic diversity among parents (Hari Prasad et al, 2018). The released hybrids are inter-varietal (indica/indica) in nature, which does not show a much significant gain of yield advantage over high yielding varieties.…”

Section: Estimation Of Indica-tropical Japonica Genome Proportionmentioning

confidence: 99%

Estimation of indica-tropical japonica genome proportion in wide compatible restorer lines derived through inter sub specific hybridization and molecular diversity analysis among rice genotypes

2023

EJPB

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The present investigation was carried out to estimate indica-tropical japonica genome proportion in two newly developed wide compatible restorer lines (RP6367 and RP6368) derived through indica-tropical japonica crosses and to study the molecular diversity among 12 rice genotypes namely, five promising indica restorers (RPHR1005, RPHR1096, IBL57, DR714-1-2 and Akshayadhan), two maintainers (IR58025B and APMS6B), two newly identified wide compatible restorer lines (RP6367and RP6368), two typical tropical japonica lines (IRGC66651 and IRGC66577) and one typical indica genotype (Nagina22) using 50 SSR markers and 45 InDELs. Out of the 95 markers, 54 were found to be polymorphic. The genotypic data of 54 polymorphic markers was used to estimate indica-tropical japonica genome proportion in derived lines and molecular diversity among 12 genotypes. The percentage of tropical japonica genome proportion in derived lines RP6367 and RP6368 was found to be 50% and 55.55% respectively. Our results suggest that the proportion of tropical japonica in hybrid rice parental lines is the key to select the best parents for efficient utilization of the heterosis present between indica and tropical japonica subspecies. Out of the 54 markers, 19 markers recorded PIC value above 0.5 and can be considered as highly informative and useful to study molecular genetic diversity. In this study, the SSRs primers showed higher PIC values compared to InDels. It is concluded that the use of highly polymorphic molecular markers detected in this study gives a better understanding of genetic relationship among closely related rice genotypes.

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Improved versions of rice maintainer line, APMS 6B, possessing two resistance genes, Xa21 and Xa38, exhibit high level of resistance to bacterial blight disease

et al. 2018

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Breeding strategies for hybrid rice parental line improvement

Cited by 6 publications

References 0 publications

Screening of high-yielding Swarna lines developed through MABB for resistance against bacterial blight and blast diseases

Screening of high-yielding Swarna lines developed through MABB for resistance against bacterial blight and blast diseases

Estimation of indica-tropical japonica genome proportion in wide compatible restorer lines derived through inter sub specific hybridization and molecular diversity analysis among rice genotypes

Improved versions of rice maintainer line, APMS 6B, possessing two resistance genes, Xa21 and Xa38, exhibit high level of resistance to bacterial blight disease

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