Selection and evaluation of Pre-harvest Sprouting tolerance in White wheat
Zhou Yong， Li Jinqiong， Li Jia， Liu Yaxi， Jiang Qiantao， Pu Zhien，Wang Jirui*
（ Triticeae Research Institute, Sichuan Agricultural University, Wenjiang Chengdu, Sichuan 611130； ）
Abstract： Pre-harvest sprouting (PHS) is considered a worldwide disaster that reduces wheat production and damages its quality. In this study, PHS evaluation of 555 wheat accessions including 502 white-grained wheat genotypes collected from five continents was conducted. Based on the test conducted for 3 years at 4 different locations, it was found that PHS tolerance was influenced by environment. Using 53 colorful genotypes as a CK, higher PHS was observed in colorful seeds than white varieties. Significantly lower germination rates were observed in cultivars rather than breeding materials and landraces in white-grained wheat. No obvious difference was observed between germination rate of breeding materials and landraces in white-grained wheat accessions. PHS tolerance of genotypes from Europe was significantly higher than other four continents. The lowest PHS were observed in Varieties from Africa and Oceanica. By evaluating a large number of white wheat genotypes, 7 white-grained wheat genotypes (AS660365, AS660442, AS660571, AS660319, AS660260, AS660342 and AS660361) were selected as high PHS tolerant and could be utilized in breeding programs for PHS in white wheat.
Keywords： Wheat; White-grained; Pre-harvest sprouting tolerance; materials