Abstract
This study dealt with the relationship of coleoptile length, first seedling leaf length, culm length, and flag leaf length of 10 wheat (Triticum aestivum L.) crosses involving seven standard-height and seven semidwarf parents. Parents included 'Dickson 114,' 'Itana' (tall, standard height); 'Cheyenne,' 'Golden' (midtall, standard height); 'Omar,' 'Burt,' 'Nord' (short, standard height); Sel. 92, 'Suwon 92,' 'Gaines,' Gaines sib 2, 'Seu Seun 27' (medium, semidwarf); Sel. 14, and Sel. 135 (short, semidwarf). Previous results with semidwarf × standard height crosses showed juvenile plant traits correlated closely with culm length. Our purpose was to determine the relationships between juvenile and adult traits in crosses of short semidwarf × medium semidwarf, medium semidwarf × medium semidwarf, medium semidwarf × standard height, and standard height × standard height crosses as well. Genotypic correlations between culm length and the two juvenile criteria varied between .38 to .89 for short semidwarf × standard height and short semidwarf × medium semidwarf crosses, but no association occurred in standard height × standard height crosses. Coleoptile length and seedling leaf length are genetically related in some crosses but not in others. The degree of association was generally closest for semidwarf × standard height crosses. Moderate positive correlations occurred between adult flag leaf length and culm length in all crosses but two. Coleoptile length and seedling leaf length related with flag leaf length in the Sel. 14 × Nord cross only. Parallel relationships between juvenile and adult plant traits are primarily contingent upon semidwarf germplasm although semidwarf Sel. 92 represents a unique exception. Close genetic relationships between juvenile and adult traits typically occurred in semidwarf × standard height crosses involving semidwarf germplasm Sel. 14 and Suwon 92. Apparently a common genetic system regulates growth of all traits for these two genotypes.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
