(Knott and Anderson, 1956) (Plate 3-13)
2B (DR Knott, pers. comm. 1993). Federation possesses a resistance gene, presumably Sr10, in chromosome 2B (RA McIntosh, unpublished 1980).
Low Infection Type
0; iN to 3C.
Temperature sensitive; sensitivity appears to vary between pathogen isolates (Green et al., 1960; Roelfs and McVey, 1979). More effective at lower temperatures.
Common wheat; first documented in a Kenyan source and Egypt Na95, a derivative of Kenyan parents. However, more recent work indicated this gene is present in Australian wheats developed prior to 1900.
Virulence for Sr10 was frequent in North America (Roelfs and McVey, 1979). Luig (1983) reported that Sr10 differentiated between pathogen isolates in South America, Israel and South Africa. Huerta-Espino (1992) found moderate levels of avirulence among cultures from Ethiopia and Turkey and high levels among those from Pakistan, Nepal and China.
i: Egypt Na95/4*Marquis (Green et al., 1960) = W2404 (Luig, 1983); Line F = W2691 + Sr10 (Luig, 1983).
v: Egypt Na95 Sr7a Sr9b (Knott and Anderson, 1956); Kenya 117A Sr7a Sr9b (Knott and Anderson, 1956).
Africa: Kenya Farmer Sr7a Sr9b Sr11 (Green et al, 1960). Other Kenyan wheats (Knott, 1957a, 1957b, 1962a).
Australia: Federation (AP Roelfs, pers. comm. 1993).
North America: Geneva (Sorrells and Jensen, 1987); Lemhi; McNair 1003; Saluda; Springfield. Red Bobs Sr7b (Dyck and Green, 1970). Caldwell Sr7b Sr9d. Benhur Sr8a. Atlas 66 Sr9b.
Use in Agriculture
Green and Knott (1962) reported that Sr1O conferred adult plant resistance but there are few data to indicate its real value. Roelfs and McVey (1979) noted that this gene was common in spring wheats in western USA. Sr10 was probably transferred by chance through the use of Kenyan material in the CIMMYT program (Knott, 1990).