Table 1: Gene symbols frequently used in this study according to the new gene nomenclature system for rice [10].

Gene symbol
Sato and Morishima (1988) [9]This studyGene full nameCultivars harboring chlorosis-causing gene

Locus/genehca-1HCA1HYBRID CHLOROSIS A1
Recessive allelehca-1hca1-1hybrid chlorosis a1-1J-147
Dominant allelehca-1+Hca1-2Hybrid chlorosis a1-2

Locus/genehca-2HCA2HYBRID CHLOROSIS A2
Recessive allelehca-2hca2-1hybrid chlorosis a2-1Akihikari, Asominori
IR24, Milyang 23
Many Japonica-type cultivars [9]
Dominant allelehca-2+Hca2-2Hybrid chlorosis a2-2