Overview of developed core and mini core collections and their effective utilization in cultivated rice and its related species (Oryza sp.)—A review

Genus Oryza consists of two cultivated and 21 related wild species. Cultivated rice is not only the staple food of the majority of the countries in the world, but it also serves as a model crop for genomic studies. The rice germplasm is conserved in different gene banks around the world, which can b...

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Bibliographic Details
Published in:Plant breeding 2022-08, Vol.141 (4), p.501-512
Main Authors: Raturi, Dhananjay, Chaudhary, Manju, Bhat, Vishnu, Goel, Shailendra, Raina, Soom Nath, Rajpal, Vijay Rani, Singh, Apekshita
Format: Article
Language:English
Subjects:
core
Cultivation
Gene banks
Germplasm
Grain cultivation
mini core
Oryza
Plant breeding
Rice
statistical packages
utilization, characterization
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Summary:Genus Oryza consists of two cultivated and 21 related wild species. Cultivated rice is not only the staple food of the majority of the countries in the world, but it also serves as a model crop for genomic studies. The rice germplasm is conserved in different gene banks around the world, which can be accessed for plant breeding programmes aiming to improve rice varieties. However, the ever‐increasing number of accessions poses problem of the phenotypic and genotypic characterization of the germplasm. Therefore, to speed up characterization and utilization of germplasm, the concept of core collection (~10–20% of total base collection) was developed which provides maximum diversity in limited number of accessions. Similarly, a mini core collection (~1–2% of the entire collection) is constructed retaining maximum diversity to provide wider genetic coverage in manageable numbers. The present review summarizes the current information on different core and mini core sets developed for varied purposes from world rice collections using different strategies.
ISSN:0179-9541
1439-0523
DOI:10.1111/pbr.13029