Biocultural diversity in traditional rice-based agroecosystems: indigenous research and conservation of mavo (Oryza sativa L.) upland rice landraces of eastern Indonesia

2006 ◽  
Vol 8 (4) ◽  
pp. 609-625 ◽  
Author(s):  
Jeanine M. Pfeiffer ◽  
Sisilia Dun ◽  
Bonafantura Mulawarman ◽  
Kevin J. Rice
Keyword(s):  
Oryza Sativa ◽  
Upland Rice ◽  
Oryza Sativa L ◽  
Biocultural Diversity ◽  
Indigenous Research ◽  
Eastern Indonesia ◽  
Rice Landraces ◽  
Traditional Rice

scholarly journals Genetic Structure and Geographical Differentiation of Traditional Rice (Oryza sativa L.) from Northern Vietnam

Plants ◽  
2021 ◽  
Vol 10 (10) ◽  
pp. 2094
Author(s):  
Ngoc Ha Luong ◽  
Le-Hung Linh ◽  
Kyu-Chan Shim ◽  
Cheryl Adeva ◽  
Hyun-Sook Lee ◽  
...  
Keyword(s):  
Genetic Diversity ◽  
Oryza Sativa ◽  
Genetic Differentiation ◽  
Oryza Sativa L ◽  
Crop Improvement ◽  
Fixation Index ◽  
Northern Vietnam ◽  
Rice Landraces ◽  
Geographical Regions ◽  
Traditional Rice

Northern Vietnam is one of the most important centers of genetic diversity for cultivated rice. Over thousands of years of cultivation, natural and artificial selection has preserved many traditional rice landraces in northern Vietnam due to its geographic situation, climatic conditions, and many ethnic groups. These local landraces serve as a rich source of genetic variation—an important resource for future crop improvement. In this study, we determined the genetic diversity and population structure of 79 rice landraces collected from northern Vietnam and 19 rice accessions collected from different countries. In total, 98 rice accessions could be differentiated into japonica and indica with moderate genetic diversity and a polymorphism information content of 0.382. Moreover, we found that genetic differentiation was related to geographical regions with an overall PhiPT (analog of fixation index FST) value of 0.130. We also detected subspecies-specific markers to classify rice (Oryza sativa L.) into indica and japonica. Additionally, we detected five marker-trait associations and rare alleles that can be applied in future breeding programs. Our results suggest that rice landraces in northern Vietnam have a dynamic genetic system that can create different levels of genetic differentiation among regions, but also maintain a balanced genetic diversity between regions.

Effects of sorbitol on expression of genes involved in regeneration of upland rice (Oryza sativa L.)

2011 ◽  
Vol 106 (3) ◽  
pp. 455-463 ◽  
Author(s):  
Xiaolei Feng ◽  
Pengke Zhao ◽  
Jianqin Hao ◽  
Jinquan Hu ◽  
Dingming Kang ◽  
...  
Keyword(s):  
Oryza Sativa ◽  
Upland Rice ◽  
Oryza Sativa L ◽  
Expression Of Genes

scholarly journals Growth performance of several promising local upland rice (Oryza sativa L.) genotypes of Southeast Sulawesi

2021 ◽  
Vol 807 (4) ◽  
pp. 042080
Author(s):  
T Wijayanto ◽  
Ramdayani ◽  
Arditya ◽  
Asniah ◽  
N W S Suliartini ◽  
...  
Keyword(s):  
Oryza Sativa ◽  
Growth Performance ◽  
Upland Rice ◽  
Oryza Sativa L

Genetic Diversity of Local Upland Rice (Oryza sativa L.) Genotypes Based on Agronomic Traits and Yield Potential in North Buton, Indonesia

2017 ◽  
Vol 9 (4) ◽  
pp. 109-117 ◽  
Author(s):  
Budianti Kadidaa ◽  
Gusti Ray Sadimantar ◽  
Suaib . ◽  
La Ode Safuan ◽  
Muhidin .
Keyword(s):  
Genetic Diversity ◽  
Oryza Sativa ◽  
Agronomic Traits ◽  
Upland Rice ◽  
Oryza Sativa L ◽  
Yield Potential

Genetic erosion in traditional rice agro-ecosystems in Southern Philippines: drivers and consequences

2020 ◽  
Vol 18 (1) ◽  
pp. 1-10
Author(s):  
Florence L. Zapico ◽  
Josefina T. Dizon ◽  
Teresita H. Borromeo ◽  
Kenneth L. McNally ◽  
Edwino S. Fernando ◽  
...  
Keyword(s):  
Environmental Degradation ◽  
Upland Rice ◽  
Genetic Erosion ◽  
Well Being ◽  
Agricultural Systems ◽  
Tribal Culture ◽  
Seed Supply ◽  
Rice Landraces ◽  
Study Results ◽  
Traditional Rice

AbstractThis paper examines genetic erosion in rice landraces thriving in traditional smallholder agricultural systems in the Sarangani uplands, Philippines. In these marginal areas, the crop is closely interwoven with tribal culture and is vital in ensuring food security among upland households. Field visits unveiled high varietal diversity for upland rice and a rich tapestry of indigenous knowledge associated with its cultivation and use. Study results, however, revealed the tapering of the crop's genetic base due to farmers' changing priorities, pest infestation, weakening seed supply systems, shift to cash crops, natural calamities, environmental degradation, government programmes and peace and order problems. Consequently, these pressures undermined traditional agricultural systems in Sarangani upland communities causing food and water scarcity, hunger and suffering on a catastrophic scale. Interdisciplinary strategies aimed at simultaneously averting further varietal losses and environmental degradation while improving human well-being are therefore warranted. Furthermore, making traditional rice farming a lucrative endeavour will induce the younger generation to remain in the uplands and choose farming as a profession. This way, biocultural restoration of agriculture will be attained and the continued presence of the tribal groups in the Sarangani uplands will be ensured for a very long time.

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