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Submitted to: Wheat Newsletter
Publication Type: Other Publication Acceptance Date: 4/1/2004 Publication Date: 8/1/2004 Citation: Wang, R. 2004. Newly released salt-tolerant wheat germplasm lines are useful in gene pyramiding. Wheat Newsletter. Interpretive Summary: Technical Abstract: Two salt-tolerant wheat germplasm lines, W4909 and W4910, were jointly released by USDA-ARS and Utah Agricultural Experiment Station in 2002. They have been registered in Crop Science as GP-730 and GP-731, PI 631164 and PI 631165, respectively. W4909 and W4910 had been compared to the known salt-tolerant cultivars Kharchia 65, KRL 1-4, KRL 19, Lu 26S and Shorawaki in a 2003 greenhouse experiment. Both W4909 and W4910 are equal to Shorawaki in survival after salinity treatment at EC=42 dS/m, whereas all the other lines had lower survival rates. At the end of salinity treatment, W4909 and W4910 had more tillers than Shorawaki. After being moved to potting medium without salt solution, W4909 and W4910 produced more seeds per spike than Shorawaki. W4910 had the highest number of spikes per plant, followed by Shorawaki and W4909. The F3 families of 'Yecora Rojo' X W4909 and Yecora Rojo X W4910 exhibited transgression segregation for salt-tolerance and agronomic traits. W4909 and W4910 were found to have salt tolerance mechanisms other than NaC1 exclusion. Therefore, we can enhance salt tolerance by gene pyramiding with crosses of W4909 or W4910 and other salt-tolerant wheat cultivars having NaC1 avoidance as the mechanism. |
