Comparison of thousand-grain weight (TGW) (g) across the 12 environments and an evaluation of treatment means (TMTGW), genotypic variance components (<i>δ</i>²_G) and broad sense heritabilities (<i>H</i>²) of TGW in the 94 varieties cultivated under four different co

1The 12 environments were created by testing each of the four treatments (IF, RF, RN, and RP) in three crop cycles in Hengshui (HS) and Jiyuan (JY). IF, RF, RN, and RP refer to irrigated and fertilised, rainfed, reduced nitrogen, and reduced phosphorus treatments, respectively; 2The mean TGW in JY was significantly lower than that in HS under the IF, RN, or RP conditions (P≤0.05); 3Values marked with dissimilar letters were statistically significant (P≤0.05).