New Insights Into the Nature of Interspecific Hybrid Sterility in Rice

Li, Jing; Zhou, Jiawu; Yang, Ying; Pu, Qiuhong; Tao, Dayun

doi:10.3389/fpls.2020.555572

Cited by 23 publications

(20 citation statements)

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“…Genes with similar functions were observed in intersubspecific crosses in Oryza sativa , such as S5 [ 11 ], S7 [ 12 ] and S9 [ 13 ]. According to [ 27 ], in the cross between O. sativa and O. meridionalis , only pollen-killer genes have been reported. Li et al [ 23 ] performed linkage analysis of five pollen-killer genes: S51 located on chromosome 1, S52 and S53 located on chromosome 2, S54 and S55 on chromosome 7.…”

Section: Discussionmentioning

confidence: 99%

“…In the history of rice gene nomenclature, S with digits have been applied to the gene symbols of both pollen sterility genes and egg sterility genes. According to a database of rice, Oryzabase (Oryzabase.Available online: accessed on 31 December 2021) [ 31 ], and a recent review on hybrid sterility by Li et al [ 27 ], S56(t) is the latest gene symbol, which was found in the cross between O. sativa and O. glumaepatula , and caused pollen semi-sterility [ 32 ]. Therefore, we name the gene found in this study as HYBRID SPIKELET STERILITY 57 , with the gene symbol of S57 , following Yoshimura and Nagato [ 33 ] and McCouch and CGSNL [ 34 ].…”

Section: Discussionmentioning

confidence: 99%

“…According to [ 27 ], the S53 gene [ 23 ], a pollen-killer gene found in the cross between O. sativa and O. meridiolis , is located on the same location as other pollen-killer genes, S22A , S22B [ 39 ] and S29 [ 40 ] on the short arm of chromosome 2. In the cross between O. sativa and O. meridiolis , O. sativa allele behaves as pollen-killer and O. meridionalis allele as abortive allele at S53 locus.…”

Section: Discussionmentioning

confidence: 99%

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New Hybrid Spikelet Sterility Gene Found in Interspecific Cross between Oryza sativa and O. meridionalis

Ichitani

Toyomoto

Uemura

et al. 2022

Plants

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Various kinds of reproductive barriers have been reported in intraspecific and interspecific crosses between the AA genome Oryza species, to which Asian rice (O. sativa) and African rice (O. glaberrima) belong. A hybrid seed sterility phenomenon was found in the progeny of the cross between O. sativa and O. meridionalis, which is found in Northern Australia and Indonesia and has diverged from the other AA genome species. This phenomenon could be explained by an egg-killer model. Linkage analysis using DNA markers showed that the causal gene was located on the distal end of chromosome 1. Because no known egg-killer gene was located in that chromosomal region, this gene was named HYBRID SPIKELET STERILITY 57 (abbreviated form, S57). In heterozygotes, the eggs carrying the sativa allele are killed, causing semi-sterility. This killer system works incompletely: some eggs carrying the sativa allele survive and can be fertilized. The distribution of alleles in wild populations of O. meridionalis was discussed from the perspective of genetic differentiation of populations.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

See 1 more Smart Citation

New Hybrid Spikelet Sterility Gene Found in Interspecific Cross between Oryza sativa and O. meridionalis

Ichitani

Toyomoto

Uemura

et al. 2022

Plants

View full text Add to dashboard Cite

show abstract

“…However, in addition to bivalents, univalents, trivalents, and tetravalents, as well as chromosome bridges and lagging chromosomes, were observed (Figure 3 and Table 5). Hybrid sterility can be caused by meiotic irregularities, chromosomal aberrations, or interactions between nuclear genes or between the cytoplasm and nuclear genes [33][34][35][36][37]. Although formation of the multivalents suggested some homologies between corresponding chromosomes as inferred from the monophyly of Suaveolentes species and a presumption that the species are allotetraploids derived from common ancestors [10,13,15,38], the univalents and multivalents, as well as chromosome bridges and lagging chromosomes, would lead to imbalanced chromosome segregation, resulting in hybrid sterility in crosses between N. benthamiana and N. excelsior.…”

Section: Discussionmentioning

confidence: 99%

Evaluation of Crossability between Nicotiana benthamiana and Nicotiana excelsior

et al. 2021

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Wild tobacco species in the Nicotiana section Suaveolentes are promising genetic resources to introduce their disease resistance to cultivated tobacco, Nicotiana tabacum. However, hybrid lethality is observed in hybrid seedlings from crosses between most Suaveolentes species and N. tabacum. In particular, N. benthamiana belonging to the section Suaveolentes produces only viable hybrids after crossing with N. tabacum. In the present study, crossability between N. benthamiana and N. excelsior (section Suaveolentes) was investigated to test the possible usefulness of N. benthamiana as the bridge parent to transfer desirable genes of N. excelsior to N. tabacum via bridge crossing. After reciprocal crosses using three accessions of N. benthamiana and N. excelsior each, several crossing barriers such as cross-incompatibility, seed abortion, and male and female hybrid sterility were observed. Although reciprocal hybrids between N. benthamiana and N. excelsior showed a high degree of chromosome pairing in meiosis, univalents and multivalents, as well as chromosome bridges and lagging chromosomes, were observed. These meiotic abnormalities were thought to cause hybrid sterility. The possible usefulness of reciprocal hybrids between N. benthamiana and N. excelsior is discussed.

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“…Postzygotic reproductive isolation usually shows hybrid lethality, hybrid necrosis/weakness and hybrid sterility ( Baack et al, 2015 ; Ouyang and Zhang, 2018 ). In the past decades, about 50 loci related to reproductive isolation of the genus Oryza have been identified ( Ouyang and Zhang, 2013 , 2018 ; Guo et al, 2016 ; Li et al, 2020 ). In indica - japonica crosses, reproductive isolation usually shows hybrid sterility.…”

Section: Genetic Basis Of Indica - Japon...mentioning

confidence: 99%

The Next Generation of Rice: Inter-Subspecific Indica-Japonica Hybrid Rice

Zhang

2022

Front. Plant Sci.

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Rice (Oryza sativa) is an important food crop and has two subspecies, indica and japonica. Since the last century, four generations of rice varieties have been applied to rice production. Semi-dwarf rice, intra-subspecific hybrid rice, and inter-subspecific introgression rice were developed successively by genetic modification based on the first generation of tall rice. Each generation of rice has greater yield potential than the previous generation. Due to the stronger heterosis of indica-japonica hybrids, utilization of the inter-subspecific heterosis has long been of interest. However, indica-japonica hybrid sterility hinders the utilization of heterosis. In the past decades, indica-japonica hybrid sterility has been well understood. It is found that indica-japonica hybrid sterility is mainly controlled by six loci, S5, Sa, Sb, Sc, Sd, and Se. The indica-japonica hybrid sterility can be overcome by developing indica-compatible japonica lines (ICJLs) or wide-compatible indica lines (WCILs) using genes at the loci. With the understanding of the genetic and molecular basis of indica-japonica hybrid sterility and the development of molecular breeding technology, the development of indica-japonica hybrid rice has become possible. Recently, great progress has been made in breeding indica-japonica hybrid rice. Therefore, the indica-japonica hybrid rice will be the next generation of rice. It is expected that the indica-japonica hybrid rice will be widely applied in rice production in the near future.

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New Insights Into the Nature of Interspecific Hybrid Sterility in Rice

Cited by 23 publications

References 90 publications

New Hybrid Spikelet Sterility Gene Found in Interspecific Cross between Oryza sativa and O. meridionalis

New Hybrid Spikelet Sterility Gene Found in Interspecific Cross between Oryza sativa and O. meridionalis

Evaluation of Crossability between Nicotiana benthamiana and Nicotiana excelsior

The Next Generation of Rice: Inter-Subspecific Indica-Japonica Hybrid Rice

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