Investigating Rice Blast Resistance Gene Distribution among Landrace Rice Varieties in Lower Northern Thailand for Improving Rice Cultivars

Figure 6

Number of rice blast resistance genes (Pi9, Pi-ta, and Pib gene) presented in individual landrace rice varieties of Phichit (PCT), Phitsanulok (PLK), and Sukhothai (STI). Note: The presence of the Pi9, Pib, and Pi-ta genes in rice verities is related to PCR amplicons in Figures 1–3, respectively. The Pi9 presents in landrace rice varieties no. 04, 23, 27, 35, 37, 38, 42, 43, 45, 46, 47, 48, 51, 52, 58, 62, 63, 66, 76, 77, 79, 81, 82, 83, 84, 85, 86, and 90 with a total of 28 (28.57%) varieties. The Pib presents in landrace rice varieties no. 06, 15, 21, 26, 28, 46, 47, 48, 50, 51, 53, 66, 67, 70, 72, 73, 74, 76, 78, 81, 86, 87, 89, 92, and 98 with a total of 25 (25.51%) varieties. The Pi-ta presents in landrace rice varieties no. 05, 09, 17, 18, 20, 26, 28, 33, 46, 47, 48, 50, 51, 53, 66, 71, 72, 73, 74, 75, 76, 77, 81, 85, 87, 88, 89, 90, and 92 with a total of 29 (29.59%) varieties.