CSIR-SARI develops new sweet potato varieties

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The inspection team at the site

Four new varieties of sweet potato have been developed for cultivation and consumption to boost the nutritional status of the citizenry whilst ensuring food security and improved income for farmers.

The varieties, PGA14008-9, PGA14011-43, PGA14372-3 and PGA14398-4, are high-yielding, early-maturing, contain more nutrients, and tolerant to pests and diseases, among others.

They were developed by the Savanna Agricultural Research Institute of the Council for Scientific and Industrial Research (CSIR-SARI), in collaboration with the International Potato Center (CIP), a non-profit international organisation, focusing on roots and tubers research development.

Members of the National Varietal Release and Registration Committee (NVRRC) of the Ministry of Food and Agriculture (MoFA), who inspected the field trials of the new sweet potato varieties at Nyankpala, were impressed at their development.

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They therefore approved the new varieties to be recommended to the Minister of Food and Agriculture to sanction the formal approval and release of the new varieties in line with the law to allow for their cultivation and consumption in the country.

Highlights

Speaking after the inspection, a member of NVRRC of MoFA, Prof Johnathan Padi Tetteh, commended CSIR-SARI for its efforts at achieving food security and reducing poverty in the country.

He urged CSIR-SARI to review and provide a valid documentation on the four sweet potato varieties and submit it to the NVRRC of MoFA as early as possible to be sent to the National Seed Council.

The country manager of CIP, Dr Tom van Mourik, expressed gratitude to members of NVRRC of MoFA for their positive response, and assured them that the documentation would be made available to them as soon as possible.

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A Plant Breeder at CSIR-SARI, Dr Joseph Adjebeng-Danquah, highlighted the characteristics of the new sweet potato varieties. He said CSIR-SARI had been examining the new varieties against four other high-yielding varieties in multi-locations (Nyankpala, Bawku, Wa, Navrongo, and Tumu) from 2017 to 2019.

He said the PGA14008-9, a pale orange-fleshed genotype, has an average and maximum yield of about 17 and 35 tonnes per hector (t/ha) of fresh roots and contains many marketable size storage roots per plant and weevil tolerant.

He explained that the PGA14011-43 is an orange-fleshed genotype with vigorous vine growth and large root size and produce up to 31.9 t/ha in three months.

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“The average fresh root yield is 19.7 t/ha with maximum of 35.14 t/ha and storage room matter ranging from 28 to 35 per cent,” he added.

Dr Adjebeng-Danquah said PGA14372-3 and PGA14398-4 have high dry matter and tolerant to weevil damage making them suitable for delay harvest.

“Also, PGA14372-3 has high desirable low sweet taste to meet consumer preference for staples whereas PGA14398-4 has sufficient level of beta-carotene, a key micronutrient for children and women,” he said.

He said CSIR-SARI has also put in place measures to ensure multiplication of the four new varieties as well as making them available to farmers and other actors in the food chain.

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