Phytopathology (1996) 86, p. S57 (Torres-Montalvo et al.)

H. Torres-Montalvo, L. Mendoza-Onofre, H. Williams-Alanis and V. Gonzalez-Hernandez (1996)
Rust reaction in tan and non-tan near-isogenic sorghum genotypes
Phytopathology 86 (11 suppl.), S57-S57
Abstract: Resistance to sorghum rust (Puccinia purpurea) has been associated with tan plant color (Rana et al., 1976), and this character can be a phenotypic criterion for selecting resistant cultivars. Five pairs of tan (T) and non-tan (R) near-isogenic lines (2 restorer and 3 male sterile) and their 24 possible crosses (6 R x R, 6 T x T, 6 T x R and 6 R x T) were evaluated for rust reaction under natural conditions in Zacatepec, Mexico. The tan character was incorporated to the parental lines, originally in red plant background, by 5 backcrossings. The lines showed a similar reaction to rust in both near-isogenic versions of plant pigmentation. However, the hybrids where the restorer parent was red (R x R, T x R) had relatively more incidence than their near-isogenic counterparts with tan plant male (T x T, R x T). Maternal effects are present in the red background, which provides susceptibility to sorghum rust in crosses where these phenotypes were used as the restorer parent.

Research topic(s) for pests/diseases/weeds:
resistance/tolerance/defence of host

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Pest and/or beneficial records:

Beneficial	Pest/Disease/Weed	Crop/Product	Country	Quarant.
	Puccinia purpurea	Sorghum (crop)