caa a22 4500 445323841 CHVBK 20180317142713.0 cr unu---uuuuu 170323e20110401xx s 000 0 eng 10.1007/s10681-010-0307-8 doi (NATIONALLICENCE)springer-10.1007/s10681-010-0307-8 Drought tolerance variability in S1 pollinator lines developed from a sugar beet open population [Elektronische Daten] [M. Ahmadi, E. Majidi Heravan, S. Sadeghian, M. Mesbah, F. Darvish] Drought tolerance is one of the most important objectives of sugar beet breeding programs in semi-arid regions, particularly during the last decade. Due to global climate changes and limitations of agricultural irrigation water, varieties with drought tolerance are taken into consideration in order to avoid yield losses due to drought. In this study, drought tolerance of 76 S1 lines (full-sib families) that had been extracted from a genetically broad base multigerm sugar beet open pollinated population, were examined. Test crosses were made between the lines as pollinators and a cytoplasmic male sterile (CMS) single cross. The consequent hybrids along with checks were evaluated during 2007 and 23 more tolerant hybrids during 2008, in two adjacent experiments under drought stress and non-stress conditions. Drought tolerance indices calculated based on sugar yield, such as mean productivity (MP), geometric mean productivity (GMP) and stress tolerance index (STI) were used to assess hybrids responses to drought. The results showed significant genetic differences for root yield and sugar yield under both conditions. Drought tolerance indices displayed significant genetic variability for sugar yield among the hybrids. Many hybrids were drought tolerant as compared with the original base population as indicated by their high STI. The estimates of heritability for sugar yield in stress and non-stress conditions were much close to each other (0.31 and 0.34, respectively). Whereas, for root yield the heritability estimate in stress condition (0.46) was relatively higher than that in non-stress condition (0.34). Significant differences were observed among the selected hybrids for root yield and sugar yield, indicating genotypic variability for pollinator lines derived from the population. There were no significant differences for sugar content. For increasing the drought tolerance potential in a breeding population and developing drought-tolerant varieties by male parent, the drought-tolerant lines could be used. Springer Science+Business Media B.V., 2010 Sugar beet nationallicence Drought tolerance nationallicence Variability nationallicence Line nationallicence Heritability nationallicence Ahmadi M. Faculty of Agricultural and Natural Resource, Science and Research Branch, Islamic Azad University, Ponak Square, P.O. Box 14515-775, 1477893855, Tehran, Iran aut Majidi Heravan E. Faculty of Agricultural and Natural Resource, Science and Research Branch, Islamic Azad University, Ponak Square, P.O. Box 14515-775, 1477893855, Tehran, Iran aut Sadeghian S. Seed & Plant Certification and Registration Institute (SPCRI), Collection Ave, Nabovvat Blvd, P.O. Box 31535-1516, Karaj, Iran aut Mesbah M. Seed & Plant Certification and Registration Institute (SPCRI), Collection Ave, Nabovvat Blvd, P.O. Box 31535-1516, Karaj, Iran aut Darvish F. Faculty of Agricultural and Natural Resource, Science and Research Branch, Islamic Azad University, Ponak Square, P.O. Box 14515-775, 1477893855, Tehran, Iran aut Euphytica Springer Netherlands 178/3(2011-04-01), 339-349 0014-2336 178:3<339 2011 178 10681 https://doi.org/10.1007/s10681-010-0307-8 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s10681-010-0307-8 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Ahmadi M. Faculty of Agricultural and Natural Resource, Science and Research Branch, Islamic Azad University, Ponak Square, P.O. Box 14515-775, 1477893855, Tehran, Iran aut NATIONALLICENCE 700 1- Majidi Heravan E. Faculty of Agricultural and Natural Resource, Science and Research Branch, Islamic Azad University, Ponak Square, P.O. Box 14515-775, 1477893855, Tehran, Iran aut NATIONALLICENCE 700 1- Sadeghian S. Seed & Plant Certification and Registration Institute (SPCRI), Collection Ave, Nabovvat Blvd, P.O. Box 31535-1516, Karaj, Iran aut NATIONALLICENCE 700 1- Mesbah M. Seed & Plant Certification and Registration Institute (SPCRI), Collection Ave, Nabovvat Blvd, P.O. Box 31535-1516, Karaj, Iran aut NATIONALLICENCE 700 1- Darvish F. Faculty of Agricultural and Natural Resource, Science and Research Branch, Islamic Azad University, Ponak Square, P.O. Box 14515-775, 1477893855, Tehran, Iran aut NATIONALLICENCE 773 0- Euphytica Springer Netherlands 178/3(2011-04-01), 339-349 0014-2336 178:3<339 2011 178 10681 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer