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“YARA & PAYA”
                            Two new Upland Rice Cultivars for the small-holders of Bolivia
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Poster32: YARA & PAYA Two new rice cultivars for the small-holders of Bolivia

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Poster32: YARA & PAYA Two new rice cultivars for the small-holders of Bolivia

  1. 1. “YARA & PAYA” Two new Upland Rice Cultivars for the small-holders of Bolivia Cruz J. 1, Guitièrrez R.1, Carizales G.2, Taboada R.2, Viruez J.2, Châtel M.3, Ospina Y.3, Grenier C.3, Rodriguez F.3 1MAN-B Bolivia, 2CIAT Santa-Cruz Bolivia, 3CIRAD/CIAT Colombia Introduction In Bolivia, rice is a very important staple food. Consumption is steadily increasing reaching in the recent years 35 kg. per capita. Two main rice production ecosystems are present: (1) the upland mechanized ecosystem where the Province of Santa Cruz represents 75% of the total Bolivian rice area and produces 80% of the total national rice production and (2) the manual ecosystem, present in all the Bolivian Provinces, where rice is produced by small farmers. Following request from rice producers of North La Paz to improve production conditions, MAN-B and CIAT Bolivia achieved a technical cooperation agreement for the development of rice varieties meeting the characteristics required by rice producers, such as medium size grain, good yield, drought tolerance, earliness, resistance to lodging and shattering, and tolerance or resistance to disease such as blast. Bolivian hillsides at Caranavi The success in developing and releasing new varieties was possible through the collaborative work that MAN-B, CIAT Santa-Cruz and the Cirad/CIAT project (Colombia) have done since 2002. Cirad/CIAT shared germplasm and technology with CIAT-SC, and MAN-B requested germplasm from CIAT- SC with the goal of obtaining high yielding rice varieties for the medium and long term, and focusing on participatory plant breeding approach. This objective was achieved through the release of these new varieties. New variety for the small farmers The new upland rice varieties YARA and PAYA are lines that originate from the Cirad/CIAT composite population PCT-11, were selected by CIAT-SC, and introduced in the Department of La Paz by MAN-B. The lines passed YARA. Small-holder’s field through the different agronomic selection and evaluation trials and were identified as promising because of their adaptation to the small-farmers conditions and good agronomic characteristics. PAYA. Seed production field Variety Characteristics YARA PAYA Average yield from field trial …..… (kg/ha). 3900 Average yield from field trial …..… (kg/ha). 4200 Initial plant vigor .................................... Vigorous Initial plant vigor .................................Strong vigor Days to maturation........................................... 130 Days to maturation........................................... 125 Plant height (cm)............................................. 120 Plant height (cm)............................................. 132 Lodging.................................................... Resistant Lodging.....................................Moderate resistance Panicle exertion ………… ...................... Emerged Panicle exertion ………… ...................... Emerged Panicle length (cm).......................................... 23.6 Panicle length (cm).......................................... 28.4 Grain number per panicle ................................ 123 Grain number per panicle ................................ 159 Maturity percentage ........................................ 73.6 Maturity percentage ........................................ 77.8 Panicle number per m2 .................................... 212 Panicle number per m2 .................................... 231 Shattering ................................ Moderate resistance Shattering ................................ Moderate resistance PAYA. Filled panicles Recommendations PAYA and YARA varieties are recommended to small-farmers for the upland hillside ecosystem with intermediate altitude. The same varieties can also be produced in the production areas of the department of La Paz as in Caranavi, Teoponte, Guanay, Palos Blancos, San Buenaventura, Ixiamas, etc. Field day by MAN-B

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