Published on: April 30, 2019, Submitted by Claudio Proietti on: February 21, 2019, Reporting year: 2018
This study documents the release and adoption of improved potato varieties (IVs) in seven major potato producing countries in Southeast, South, and East Asia. Data on varietal release from 1952 to 2015 was considered. Of over a total of 491 IVs released, 210 (43%) are adopted and cultivated; 63 of those are CIP-related IVs. In 2015, potato cultivated area was 7.6M ha and 97% was planted to IVs. 19% (1.4M ha) of this area was planted to CIP-related IVs.
STORY FOR COMMUNICATION USE
In close collaboration with NARS, international agricultural research centers have greatly contributed to the development and release of improved varieties in Southeast, East, and South Asia. During the Green Revolution (1960-2000), breeding programs strongly focused on high-yielding varieties to combat undernourishment. Thereafter, global challenges such as climate change, related biotic stresses, and the awareness of the importance of micronutrients in rural diets influenced breeding objectives that progressively included traits related with enhanced crop resilience and nutritional value.
Since the start of documenting varietal release, NARS have released a total of 491 varieties in the study region. Of those total releases about 40% have found their way onto the farmers’ fields. On average, breeding programs placed more emphasis on biotic (i.e. late blight, bacterial wilt, x-virus, y-virus, s-virus, leaf curl, and nematodes) than abiotic (i.e. drought, heat, and frost) traits.
In 2015, the potato area in the study region was 7.65M ha. An incredible 97% of the area was planted to improved varieties. The area planted with improved varieties increased by 11% compared to 2007. Between 1997 and 2007, the area increased by 27% which means that expansion has slowed down in the last years. Whereas improved varieties were generally widely adopted, in Bangladesh and Nepal adoption was very high over 80% each.
The number of farming households cultivating potatoes was inferred from country-specific farm/HH size estimates. Based on these estimates, in the study region, a total of 15.3M farming households were cultivating potatoes in 2015, of which 14.5M households were using improved varieties.
CIP has contributed to the development of 168 improved varieties which is 34% of the total releases. 30% (63) of the released varieties have resulted in adoptions. In general, CIP-related releases and adoptions followed a similar increasing trend compared to the overall trend. In terms of area, CIP-related varieties were planted to about 1.43M ha which was about 19% of the total area. This represents a large increase compared with 2007 when 7% of the total area was under CIP-related material.
In China, 25% of the total potato area was planted to CIP-related varieties (1.24M ha). In Nepal, CIP had made much impact as well. Here, 34% of the total area was planted to CIP-related varieties.
2.93M households have been reached with CIP-related varieties. Most of the beneficiaries have been reached in China (2.5M), India (0.2M), and Nepal (0.14M).
ELABORATION OF IMPACT STATEMENT
In this study, we close the identified gaps in the existing literature and national statistics on release and adoption data of improved potato varieties by documenting the release and adoption in seven major potato producing countries in Southeast, South, and East Asia. Methodologically, this study adopts a refined expert elicitation (EE) approach applied in previous projects. An average of 15 experts working in the potato value chain participated in a one-day event to elicit perceived adoption rates and to update release databases. In total, 347 experts attended 23 workshops which were held during 2014-2016. Release and adoption of potato improved varieties was studied in Bangladesh, China, India, Indonesia, Nepal, Pakistan, and Vietnam. In 2015, the potato area in our study region was 7.6M ha. About 97% of the area was planted to improved varieties (IVs). In terms of area, CIP-related varieties were planted to about 1.4M ha which is about 19% of the total area. China accounts for most (87%) of total area cultivated to CIP-related varieties. About 3M households were using CIP-related material, particularly in China (2.5M), India (0.2M) and Nepal (0.1M).
The study documents the key traits that constituted key breeeding objectives in the past decades. In addition to high-productivity, key traits were related to climate resilience (i.e. resistance against drought, heat, and frost) and resistance against biotic stresses (i.e. late blight, bacterial wilt, x-virus, y-virus, s-virus, leaf curl, and nematodes). The study shows how climate resilience has increasingly been targeted in breeding programs and this was reflected in the number of varieties released with these traits in the decade 2004 - 2014.
We gratefully acknowledge funding provided for this study by Bill and Melinda Gates Foundation, CGIAR’s Standing Panel of Impact Assessment, Michigan State University and CGIAR Research Program on Roots, Tubers, and Bananas (RTB).
Gatto, M.; Hareau, G.; Pradel, W.; Suarez, V.; Qin, J. 2018. Release and adoption of improved potato varieties in Southeast and South Asia. International Potato Center (CIP) Lima, Peru. ISBN 978-92-9060-501-0. 42p. Social Sciences Working Paper No. 2018-2
Gatto, M., Pradel, W., Suarez, V., Qin, J., Hareau, G. (2016a). Dataset for: Modern potato varietal release information in selected countries in Southeast and South Asia. International Potato Center Dataverse, V1.
Gatto, M., Pradel, W., Suarez, V., Qin, J., Hareau, G. (2016b). Dataset for: Adoption estimates of modern potato varieties in selected countries in Southeast and South Asia. International Potato Center Dataverse, V1.