2006 年 40 巻 1 号 p. 13-20
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 F1, F2 and F3 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 F2 and F3 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 F4 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 F1 and F2 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 F1 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 F2 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.
