Chromosomal Location of HCA1 and HCA2, Hybrid Chlorosis Genes in Rice

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 study	Gene full name	Cultivars harboring chlorosis-causing gene
Locus/gene	hca-1	HCA1	HYBRID CHLOROSIS A1
Recessive allele	hca-1	hca1-1	hybrid chlorosis a1-1	J-147
Dominant allele	hca-1^+	Hca1-2	Hybrid chlorosis a1-2
Locus/gene	hca-2	HCA2	HYBRID CHLOROSIS A2
Recessive allele	hca-2	hca2-1	hybrid chlorosis a2-1	Akihikari, Asominori
				IR24, Milyang 23
				Many Japonica-type cultivars [9]
Dominant allele	hca-2^+	Hca2-2	Hybrid chlorosis a2-2