Seedling emergence, coleoptile length, and plant height relationships in crosses of dwarf and standard-height wheats

✍ Scribed by G. N. Fick; C. O. Qualset

• Publisher: Springer
• Year: 1976
• Tongue: English
• Weight: 361 KB
• Volume: 25
• Category: Article
• ISSN: 0014-2336
• DOI: 10.1007/bf00041606

✦ Synopsis

Seedling emergence was closely correlated with coleoptile length and plant height among parents, Fz, and F3 populations of crosses involving dwarf wheats Olesen Dwarf (CI 14497), Norin 10 derivative D6301, Tom Thumb derivative D6899, and the standard-height varieties Ramona 50 and Nainari 60. Genetic mechanisms that governed plant height also influenced coleoptile length, but the relative effects of genes showing dominant or epistatic effects appeared to be different. With respect to the two parents involved in each of 15 crosses, mean F2 coleoptile lengths were consistently closer to the low parent value than were corresponding mean F 2 plant heights. A slight curvilinear relationship was also found between coleoptile length and plant height of F3 lines. The results suggest that selection of semidwarf wheats with long coleoptiles and improved emergence properties from crosses involving the dwarf wheats of this study would be unlikely.