Effect of planting dates on yield wheat promising lines in Chiang Mai and Mae Hong Son

Abstract

Wheat is a genetically diverse crop with promising lines that are selectively grown in Thailand. Wheat promising lines have different needs for the right environment. The objective of this study was to determine the optimal planting date for wheat promising lines in each area. The planting dates were varied into 1) Mid-November 2) Early-December 3) Mid December and 4) Early January. Wheat promising lines consisted of 12 Lines/Variety. The wheat lines were planted in the northern region of Thailand, 4 areas included 1) Baan Sri Donchai, Wiang Nuea Subdistrict, Pai District, Mae Hong Son Province 2) Ban Pa Bong Piang, Chang Keng Subdistrict, Mae Chaem District, Chiang Mai Province 3) Samoeng Rice Research Center, Samoeng District, Chiang Mai Province and 4) Ban Thung Luang, Mae Win Subdistrict, Mae Wang District, Chiang Mai Province. The results showed that the rainfed upland at Ban Sri Donchai should be planted with PMPBWS89013, LARTC-W89011 and Samerng 2 in Mid-November, rainfed highlands (800-1,000 m. MLS) at Ban Pa Bong Piang and Samoeng Rice Research Center should be planted with SMGBWS88008, PMPBWS89013 and LARTC-W89011 in Mid-December, and rainfed highlands (1,000-1,200 m. MLS) of Ban Thung Luang should be planted with SMGBWS88008, PMPBWS89013 and LARTC-W89011 in Mid-November to Early January as it was established the highest average of yield.