The origin, evolution, cultivation, dissemination, and diversification of Asian and African rices

Chang, T. T.

doi:10.1007/bf00041576

Cited by 455 publications

(217 citation statements)

References 41 publications

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“…indica and japonica. This was confirmed by evidence from biochemical data, hybrid sterility and molecular analyses [6,27,28]. However, population structure and classification within subspecies have been debated over a long period.…”

Section: Population Structure and Geographical Differentiation Withinmentioning

confidence: 78%

Genetic structure and eco-geographical differentiation of cultivated Hsien rice (Oryza sativa L. subsp. indica) in China revealed by microsatellites

Zhang

Hong-liang

et al. 2012

Chin. Sci. Bull.

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Indica is not only an important rice subspecies widely planted in Asia and the rest of the world, but it is also the genetic background of the majority of hybrid varieties in China. Studies on genetic structure and genetic diversity in indica germplasm resources are important for the classification and utilization of cultivated rice in China. Using a genetically representative core collection comprising 1482 Chinese indica landraces, we analysed the genetic structure, geographic differentiation and diversity. Model-based structure analysis of varieties within three ecotypes revealed nine eco-geographical types partially accordant with certain ecological zones in China. Differentiation of eco-geographical types was attributed to local ecological adaption and physical isolation. These groups may be useful for developing heterotic groups of indica. To facilitate the identification of different ecotypes and eco-geographical types, we identified characteristic SSR alleles of each ecotype and eco-geographical type and a rapid index of discrimination based on characteristic alleles. The characteristic alleles and rapid discrimination index may guide development of heterotic groups, and selection of hybrid parents.

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Section: Population Structure and Geographical Differentiation Withinmentioning

confidence: 78%

Genetic structure and eco-geographical differentiation of cultivated Hsien rice (Oryza sativa L. subsp. indica) in China revealed by microsatellites

Zhang

Hong-liang

et al. 2012

Chin. Sci. Bull.

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“…Early reports suggested that indica originally was domesticated from O. rufipogon and that japonica was further generated from indica (12,34). Recent studies propose that indica and japonica originated independently from different populations of O. rufipogon (35,36).…”

Section: Discussionmentioning

confidence: 99%

Hybrid male sterility in rice controlled by interaction between divergent alleles of two adjacent genes

Long

Zhao

Niu

et al. 2008

Proc. Natl. Acad. Sci. U.S.A.

238

257

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Sterility is common in hybrids between divergent populations, such as the indica and japonica subspecies of Asian cultivated rice (Oryza sativa). Although multiple loci for plant hybrid sterility have been identified, it remains unknown how alleles of the loci interact at the molecular level. Here we show that a locus for indicajaponica hybrid male sterility, Sa, comprises two adjacent genes, SaM and SaF, encoding a small ubiquitin-like modifier E3 ligase-like protein and an F-box protein, respectively. Most indica cultivars contain a haplotype SaM ؉ SaF ؉ , whereas all japonica cultivars have SaM ؊ SaF ؊ that diverged by nucleotide variations in wild rice. Male semi-sterility in this heterozygous complex locus is caused by abortion of pollen carrying SaM ؊ . This allele-specific gamete elimination results from a selective interaction of SaF ؉ with SaM ؊ , a truncated protein, but not with SaM ؉ because of the presence of an inhibitory domain, although SaM ؉ is required for this male sterility. Lack of any one of the three alleles in recombinant plants does not produce male sterility. We propose a two-gene/threecomponent interaction model for this hybrid male sterility system. The findings have implications for overcoming male sterility in inter-subspecific hybrid rice breeding.allelic interaction ͉ gamete selection ͉ hybrid sterility ͉ reproductive barrier ͉ two-gene/three-component model

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“…On the basis of gross morphology, Matsuo (1952) recognized a third type of cultivar that was later referred to as Javanica by Morinaga and Kuriyama (1958) according to its geographical distribution. Although Oka (1958) considered Japonica and Javanica as tropical and temperate components of a single Japonica type, the Indica, Japonica and Javanica terms have been used by many rice workers to refer to three morphological types (Chang, 1976;Glaszmann, 1987;Khush, 1997). In recent decades, the classification of five major groups of rice cultivars identified by Garris et al (2005) have been widely accepted, which provided a clearer description of the population structure and organization of rice germplasm.…”

Section: Six Distinct and Major Groups Within O Sativamentioning

confidence: 99%

Genetic diversity and classification of Oryza sativa with emphasis on Chinese rice germplasm

et al. 2013

Heredity

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Despite extensive studies on cultivated rice, the genetic structure and subdivision of this crop remain unclear at both global and local scales. Using 84 nuclear simple sequence repeat markers, we genotyped a panel of 153 global rice cultivars covering all previously recognized groups and 826 cultivars representing the diversity of Chinese rice germplasm. On the basis of modelbased grouping, neighbour-joining tree and principal coordinate analysis, we confirmed the widely accepted five major groups of rice cultivars (indica, aus, aromatic, temperate japonica and tropical japonica), and demonstrated that rayada rice was unique in genealogy and should be treated as a new (the sixth) major group of rice germplasm. With reference to the global classification of rice cultivars, we identified three major groups (indica, temperate japonica and tropical japonica) in Chinese rice germplasm and showed that Chinese temperate japonica contained higher diversity than that of global samples, whereas Chinese indica and tropical japonica maintained slightly lower diversity than that present in the global samples. Particularly, we observed that all seasonal, drought-tolerant and endosperm types occurred within each of three major groups of Chinese cultivars, which does not support previous claims that seasonal differentiation exists in Indica and drought-tolerant differentiation is present in Japonica. It is most likely that differentiation of cultivar types arose multiple times stemming from artificial selection for adaptation to local environments.

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The origin, evolution, cultivation, dissemination, and diversification of Asian and African rices

Cited by 455 publications

References 41 publications

Genetic structure and eco-geographical differentiation of cultivated Hsien rice (Oryza sativa L. subsp. indica) in China revealed by microsatellites

Genetic structure and eco-geographical differentiation of cultivated Hsien rice (Oryza sativa L. subsp. indica) in China revealed by microsatellites

Hybrid male sterility in rice controlled by interaction between divergent alleles of two adjacent genes

Genetic diversity and classification of Oryza sativa with emphasis on Chinese rice germplasm

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