The glossy leaf is a genetic trait that showed pleiotropic effects on disease and pest resistances as well as being a varietal marker in
Brassica oleracea and
Zea mays. The author aimed to clarify the genetic characteristics of glossiness that were newly found in sorghum leaves. The F
1, F
2 and F
3 populations derived from two crosses of (g × G) were evaluated for leaf glossiness by spraying water. Since the expected ratios of (g : G = 1 : 3) were well fitted in the segregations of F
2 and F
3 populations, a single recessive factor for the control of glossy (g) was confirmed, and the symbols
gl and
Gl were tentatively assigned for g and G. The F
4 lines with
gl and
Gl derived from two crosses of (g × G) were examined for pleiotropic effects on leaf digestion and leaf blight resistance. The 23 F
1 and F
2 between 7 varieties having non-glossy (G), glossy (g) and true-glossy (tg) phenotypes were evaluated for leaf glossiness by spraying water. The phenotypes of F
1 were tg in (tg × tg), g in (tg × g) and (g × g), and G in (tg × G) and (g × G). The expected ratios of (tg : g = 1 : 3), (tg : G = 1 : 3) and (g : G = 1 : 3) in F
2 segregations were fitted well. The results suggested that tg, g and G were multiple alleles located in a glossy locus. Consequently, the symbols
gl1, gl2 and
gl+ were proposed to denote the multiple alleles for g, tg and G in the glossy locus, respectively.
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