Registration of 24 ‘IR36’ Rice Trisomic Lines

Twenty‐four of the ‘IR36’ rice ( Oryza sativa L.) trisomic seed stocks, including 10 primary trisomics lines, Triplo 1, Triplo 3, Triplo 4, Triplo 5, Triplo 7, Triplo 8, Triplo 9, Triplo 10, Triplo 11, and Triplo 12 (Reg. No. GS‐9 to GS‐18, GSOR 101 to GSOR 110); 7 secondary trisomic lines identified as 2n + 5S·5S, 2n + 7S·7S, 2n + 8S·8S, 2n + 8L·8L, 2n + 11S·11S, 2n + 11L·11L, and 2n + 12S·12S (Reg. No. GS‐19 to Reg. No. GS‐25, GSOR 111 to GSOR 117), 7 telotrisomic lines identified as 2n + ·2L, 2n + ·3L, 2n + ·7S, 2n + ·8S, 2n + ·9S, 2n + ·10S, and 2n + ·12S (Reg. No. GS‐26 to Reg. No. GS‐32, GSOR 118 to GSOR 124); plus the disomic IR36 (Reg. No. GS‐33, GSOR 125) are being made available through the USDA–ARS Genetic Stocks Oryza (GSOR) collection. The lines were imported from the International Rice Research Institute in the Philippines; the trisomic plants were reselected as mature plants in a quarantine greenhouse, and seed from the selected plants was grown in the field for several years at Stuttgart, AR. Segregating trisomic plants were identified based on morphology, and selections were confirmed by meiotic analysis. Data were collected on number of days to heading, plant height, panicle length, flag leaf length and width, number of seeds per panicle, and seed size traits from segregating trisomic plants.