Rice functional genomics research: Progress and implications for crop genetic improvement

Jiang, Yunhe; Cai, Zhaoxia; Xie, Weibo; Long, Tuan; Yu, Huihui; Zhang, Qifa

doi:10.1016/j.biotechadv.2011.08.013

Cited by 107 publications

(68 citation statements)

References 161 publications

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“…Recent advances in rice functional genomic research have provided great opportunities to reveal additional beneficial alleles for breeding (11). Previously, we reported the identification of Carbon Starved Anther (CSA), an R2R3 MYB transcription factor that regulates sugar partitioning from photosynthetic tissues (sources) to anthers (sinks) to promote pollen maturation (12).…”

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confidence: 99%

Mutation in CSA creates a new photoperiod-sensitive genic male sterile line applicable for hybrid rice seed production

Zhang

et al. 2012

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

115

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Rice is a major staple food worldwide. Making hybrid rice has proved to be an effective strategy to significantly increase grain yield. Current hybrid rice technologies rely on male sterile lines and have been used predominantly in indica cultivars. However, intrinsic problems exist in the implementation of these technologies, such as limited germplasms and unpredictable conversions from sterility to fertility in the field. Here, we describe a photoperiod-controlled male sterile line, carbon starved anther (csa), which contains a mutation in an R2R3 MYB transcription regulator of pollen development. This mutation was introduced into indica and japonica rice, and it rendered male sterility under short-day conditions and male fertility under long-day conditions in both lines. Furthermore, F 1 plants of csa and a restorer line JP69 exhibited heterosis (hybrid vigor), suggesting the feasibility of using this mutation to create hybrid rice. The csabased photoperiod-sensitive male sterile line allows the establishment of a stable two-line hybrid system, which promises to have a significant impact on agriculture.PGMS line | hybrid breeding | sugar partitioning R ice (Oryza sativa L.) is a major staple food that feeds more than one-half of the human population (1). The three-and two-line hybrid rice breeding technologies take advantage of heterosis (hybrid vigor) and have been successfully applied in many countries, leading to a more than 20% yield increase over inbred varieties (2). The three-line hybrid rice breeding system was developed in the 1970s after the revolutionary discovery of the wild abortive cytoplasmic male sterile cytoplasm (CMS-WA) for the breeding of CMS lines, which solved the problem of selfpollination in the varieties used for hybrid rice production (3). In this technology, a restorer line that contains the restorer gene(s) is used as the pollen donor to recover male fertility in F 1 plants (hybrid rice) after its cross with the CMS line (Fig. S1A). To maintain CMS, a maintainer line, which has viable pollen grains and normal seed sets, is used as the pollinator to cross with the CMS line (Fig. S1A). Although this system has been widely used for hybrid rice seed production, the requirement of a maintainer line with normal cytoplasm and a restorer line with nuclearencoded fertility restorer genes restricts breeders from exploiting more rice germplasms and complicates the procedures for generating hybrid seeds (4).As a replacement of the three-line technology, a two-line system has been developed and applied for hybrid rice seed production after the discovery of the environmentally sensitive genic male sterile lines controlled by nuclear recessive gene(s). A japonica cultivar, Nongken 58S (NK58S), was the first spontaneous photoperiod-sensitive genic male sterile (PGMS) mutant identified (5). Because indica varieties are predominant in most rice planting regions, the PGMS loci/locus in NK58S were/was introduced into indica to generate breeding cultivars, such as Peiai 64S (PA64S) and Xin'an S. These ...

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confidence: 99%

Mutation in CSA creates a new photoperiod-sensitive genic male sterile line applicable for hybrid rice seed production

Zhang

et al. 2012

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

115

100

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“…Particularly, 80% of rice production in the world comes from Asian countries [1]. More than half of the world's population constantly includes rice in their diet, and about 2808 calories are provided by rice per person per day [2]. As world population growth and climate change are undeniable, demands for higher yield and better quality rice have become a critical issue [3].…”

Section: Introductionmentioning

confidence: 99%

Identification of Phenotypic Variation and Genetic Diversity in Rice (Oryza sativa L.) Mutants

Anh

Khanh

Dat³

et al. 2018

Agriculture

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Abstract:In this study, phenotypic variation and genetic diversity, important factors to decide germplasm for rice breeding, were evaluated among 15 rice mutants attained from the MNU (N-Nitroso-N-methylurea) mutation. The correlation coefficient values among these phenotypic characteristics were calculated. The results showed that full grain number per plant was the most relevant factor contributing to grain yield per plant, and grain length to width ratio was the key parameter affected to amylose content. Furthermore, the genetic variation among mutants was estimated by Simple Sequence Repeat (SSR) markers related to amylose content trait. Fifty-six polymorphism markers covering across eleven rice chromosomes were recorded with an average of 3.02 alleles per locus. The average value of polymorphism information content was 0.47. By using the unweighted pair group method with arithmetic mean (UPGMA) clustering, four clusters were generated with the genetic similarities ranging from 0.52 to 0.91. The variation among groups was 34%, while the variation among individuals within groups was 66%. Findings of this study provided useful genetic background and phenotypic information of collected rice mutants to breed rice cultivars with improved quality.

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“…Much researches have been done on QTLs mapping of salt-tolerant rice (Cheng et al, 2012), salt-tolerant genes cloning and expression (Jiang et al, 2012). Hu et al (2010) reviewed the progress of domestic research on salt-tolerant rice germplasm resources, mapping QTLs conferring salt-tolerance, cloning salt-tolerant genes and breeding salt-tolerant rice varieties.…”

Section: Improved Salt-tolerant Varieties For Planting On Coastal Salmentioning

confidence: 99%

Developing and sustainably utilize the coastal mudflat areas in China

Long

Liu

Shao

et al. 2016

Science of The Total Environment

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Rice functional genomics research: Progress and implications for crop genetic improvement

Cited by 107 publications

References 161 publications

Mutation in CSA creates a new photoperiod-sensitive genic male sterile line applicable for hybrid rice seed production

Mutation in CSA creates a new photoperiod-sensitive genic male sterile line applicable for hybrid rice seed production

Identification of Phenotypic Variation and Genetic Diversity in Rice (Oryza sativa L.) Mutants

Developing and sustainably utilize the coastal mudflat areas in China

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