Sequencing the Rice Genome: Gateway to Agricultural Development

Paul, Anindita

doi:10.1007/978-981-15-4120-9_6

Cited by 1 publication

(1 citation statement)

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“…Rice ( Oryza sativa L.) is a staple food crop predominantly cultivated and consumed in Asia and Africa and ranks as the world’s number one food crop ( Anuonye et al., 2016 ). It provides nearly 50% of the daily caloric intake for consumers ( Paul, 2020 ). Direct-seeded rice (DSR) is a popular cultivation method due to its low labor requirements and minimal water and energy consumption.…”

Section: Introductionmentioning

confidence: 99%

Genomic landscape of the OsTPP7 gene in its haplotype diversity and association with anaerobic germination tolerance in rice

Aung

Maung

et al. 2023

Front. Plant Sci.

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Early season flooding is a major constraint in direct-seeded rice, as rice genotypes vary in their coleoptile length during anoxia. Trehalose-6-phosphate phosphatase 7 (OsTPP7, Os09g0369400) has been identified as the genetic determinant for anaerobic germination (AG) and coleoptile elongation during flooding. We evaluated the coleoptile length of a diverse rice panel under normal and flooded conditions and investigated the Korean rice collection of 475 accessions to understand its genetic variation, population genetics, evolutionary relationships, and haplotypes in the OsTPP7 gene. Most accessions displayed enhanced flooded coleoptile lengths, with the temperate japonica ecotype exhibiting the highest average values for normal and flooded conditions. Positive Tajima’s D values in indica, admixture, and tropical japonica ecotypes suggested balancing selection or population expansion. Haplotype analysis revealed 18 haplotypes, with three in cultivated accessions, 13 in the wild type, and two in both. Hap_1 was found mostly in japonica, while Hap-2 and Hap_3 were more prevalent in indica accessions. Further phenotypic performance of major haplotypes showed significant differences in flooded coleoptile length, flooding tolerance index, and shoot length between Hap_1 and Hap_2/3. These findings could be valuable for future selective rice breeding and the development of efficient haplotype-based breeding strategies for improving flood tolerance.

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Section: Introductionmentioning

confidence: 99%