Table 4. Introduction of indica hybrid rice varieties used in the study.

Varieties	Parents	Breeding institutes
IIyou 498	II-32A×Shuhui 498	Rice Research Institute of Sichuan Agricultural University
Gangyou 527	Gang 46A×Shuhui 527	Rice Research Institute of Sichuan Agricultural University
Gangyou 906	Gang 46A×Ronghui 906	Chengdu Academy of Agriculture and Forestry Sciences
Dexiang 4103	Dexiang 074A×Luhui H103	Sichuan Academy of Agricultural Sciences
Gangyou 188	Gang 46A×Lehui 188	Leshan Agriculture and Animal Husbandry Science
		Research Institute
Chuanxiang 9838	Chuanxiang 29A×Fuhui 838	Sichuan Tianyu Seed Co., Ltd, Crop Research Institute of
		Sichuan Academy of Agricultural Sciences