Hybrid Rice Research: Current Status and Prospects

Rout, Diptibala; Jena, Debarchana; Singh, Vineeta; Kumar, Manish; Arsode, Pandurang; Singh, Prakash; Katara, Jawahar Lal; Samantaray, Sanghamitra; Verma, Ramlakhan

doi:10.5772/intechopen.93668

Cited by 20 publications

(28 citation statements)

References 34 publications

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“…To bridge the ensuing gap in food demand, rice production needs to be boosted, and one of the probable approaches is extending hybrid rice cultivation. However, the popularity of rice hybrids in India has been very slow, primarily due to factors such as low marginal yield gain over pure line varieties, increased seed cost and the need for seed renewal at every cropping cycle [ 21 ]. To meet this challenge, heterosis in rice hybrids needs to be improved.…”

Section: Discussionmentioning

confidence: 99%

Population Dynamics of Wide Compatibility System and Evaluation of Intersubspecific Hybrids by indica-japonica Hybridization in Rice

Kallugudi

Singh

Vinod

et al. 2022

Plants

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The exploitation of heterosis through intersubspecific hybridisation between indica and japonica has been a major breeding target in rice, but is marred by the cross incompatibility between the genomes. Wide compatibility (WC) is a triallelic system at the S5 locus on chromosome 6 that ensures the specificity of hybridisation within and between indica and japonica. The S5n allele that favours intercrossing is sparsely distributed in the rice gene pool and therefore warrants identification of diverse WC sources to develop superior intersubspecific hybrids. In this study, we have identified several novel WC sources through the marker-assisted screening of a large set of 950 rice genotypes. Seventeen percent of the genotypes carried S5n, which fell into two subpopulations. The WC genotypes showed wide phenotypic and genotypic variability, including both indica and japonica lines. Based on phenotypic performance, the WC varieties were grouped into three clusters. A subset of 41 WC varieties was used to develop 164 hybrids, of which WC/japonica hybrids showed relative superiority over WC/indica hybrids. The multilocation evaluation of hybrids indicated that hybrids derived from WC varieties, such as IRG137, IRG143, OYR128, and IRGC10658, were higher yielding across all the three different locations. Most of the hybrids showed the stability of performance across locations. The identified diverse set of wide compatible varieties (WCVs) can be used in the development of intersubspecific hybrids and also for parental line development in hybrid rice breeding.

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Section: Discussionmentioning

confidence: 99%

Population Dynamics of Wide Compatibility System and Evaluation of Intersubspecific Hybrids by indica-japonica Hybridization in Rice

Kallugudi

Singh

Vinod

et al. 2022

Plants

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“…The autogamous nature of rice poses a tough task for hybrid breeding due to the requirement of large‐scale crossing and maintenance. The utility of HIS can be optimized to exploit the underdeveloped phenomenon of heterosis, which displayed a high yielding nature parallel to the pure lines (Rout et al, 2020). Moreover, the burden of emasculation can be overcome after the establishment of a handy paternal HIS, which has the potential to deliver the CMS line system into the target line within one generation, irrespective of genetic background.…”

Section: Prospects Of His In Ricementioning

confidence: 99%

Strategies and prospects of haploid induction in rice (Oryza sativa)

et al. 2021

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Being a model crop as well as a staple food crop, rice possesses a conspicuous position in plant sciences. Doubled haploid (DH) breeding in rice offers multiple advantages over conventional methods via accelerating the process of pure lines development. For ages, several methods have been devised for haploid production in rice. In vitro‐based methods have demonstrated their potential in DH production, but these methods are further impeded by stringent requirements and restricted to few species. Further, unlike maize, the in vivo DH breeding technology is still impractical in rice. Recent findings of the key molecular players behind the haploid induction (HI) trait in maize and rice have shown their potential in rice improvement programmes. In this review, we have discussed different strategies of HI in rice particularly focusing on recent progress made for developing haploid inducer stock (HIS) by employing both conventional and modern approaches. It also focuses on future implications of HIS so that it can be incorporated in the pipeline of modernized rice breeding.

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“…In rice and maize, genes associated with GMS are well-characterized, and hybrid production using male sterile lines is common ( Li et al., 2007 ; Qi et al., 2020 ; Rout et al., 2020 ). In these crops, as well as in model organisms like Arabidopsis , substantial genetic resources exist regarding GMS that can be used for the discovery of homologous genes in other species.…”

Section: Introductionmentioning

confidence: 99%

Homology-based identification of candidate genes for male sterility editing in upland cotton (Gossypium hirsutum L.)

et al. 2022

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Upland cotton (Gossypium hirsutum L.) accounts for more than 90% of the world’s cotton production, providing natural material for the textile and oilseed industries worldwide. One strategy for improving upland cotton yields is through increased adoption of hybrids; however, emasculation of cotton flowers is incredibly time-consuming and genetic sources of cotton male sterility are limited. Here we review the known biochemical modes of plant nuclear male sterility (NMS), often known as plant genetic male sterility (GMS), and characterized them into four groups: transcriptional regulation, splicing, fatty acid transport and processing, and sugar transport and processing. We have explored protein sequence homology from 30 GMS genes of three monocots (maize, rice, and wheat) and three dicots (Arabidopsis, soybean, and tomato). We have analyzed evolutionary relationships between monocot and dicot GMS genes to describe the relative similarity and relatedness of these genes identified. Five were lowly conserved to their source species, four unique to monocots, five unique to dicots, 14 highly conserved among all species, and two in the other category. Using this source, we have identified 23 potential candidate genes within the upland cotton genome for the development of new male sterile germplasm to be used in hybrid cotton breeding. Combining homology-based studies with genome editing may allow for the discovery and validation of GMS genes that previously had no diversity observed in cotton and may allow for development of a desirable male sterile mutant to be used in hybrid cotton production.

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Hybrid Rice Research: Current Status and Prospects

Cited by 20 publications

References 34 publications

Population Dynamics of Wide Compatibility System and Evaluation of Intersubspecific Hybrids by indica-japonica Hybridization in Rice

Population Dynamics of Wide Compatibility System and Evaluation of Intersubspecific Hybrids by indica-japonica Hybridization in Rice

Strategies and prospects of haploid induction in rice (Oryza sativa)

Homology-based identification of candidate genes for male sterility editing in upland cotton (Gossypium hirsutum L.)

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