Inheritance of slow rusting to stem rust in wheat

✍ Scribed by B. Skovmand; Roy D. Wilcoxson; B. L. Shearer; R. E. Stucker

• Book ID: 104617839
• Publisher: Springer
• Year: 1978
• Tongue: English
• Weight: 847 KB
• Volume: 27
• Category: Article
• ISSN: 0014-2336
• DOI: 10.1007/bf00039123

✦ Synopsis

The inheritance of the slow rusting character was studied on FS progenies from seven spring wheat cultivars (Triticum aestivum) crossed in all possible combinations without reciprocals. The cultivars and their progenies were evaluated for slow rusting in 1974 and 1975 in epidemics of Puccinia graminis f. sp. tritici, races 15 and 151, and traces of other races. Slow rusting varied significantly among the parents and among the FS progeny of each cross. Transgressive segregation occurred in each cross, i.e. some progeny rusted more slowly than the parents and some faster. In crosses with both Idaed 59 and Kenya 58 the progeny distributions were skewed towards slow rust development but the distributions in the other crosses were norm& The genetic control of slow rusting was predominantly additive, and narrow sense heritability was approximately 80 percent. The number of segregating genes having an effect on slow rusting was estimated to be 2 to 12 pairs depending on the cross, Correlation between slow rusting and maturity was usually negative but in most crosses the relationship was small.

r Contribution

No. 9624 from the Agricultural Experiment Station,