Investigation on sugar beet test cross genotypes variation for seedling and field characteristics under drought stress conditions

Saravani, Samira; Sobhani, Alireza; Ahmadi, Masoud

doi:10.22077/escs.2016.218

Document Type : Original Article

Authors

¹ Gaduate student at Islamic Azad University of Tabriz

² Staff member at Khorasan Razavi Agricultural Natural Resource Research Center, Mashhad, Iran

³ Staff members at Khorasan Razavi Agricultural Natural Resource Research Center, Mashhad, Iran

https://doi.org/10.22077/escs.2016.218

Abstract

This study was carried out to investigate the genetic variation of sugar beet testcrosses for drought tolerance in the lab (faculty of Tabriz Islamic Azad University) and field conditions (Khorasan Agriculture and Natural Recourses Research Center) in 2010. In the lab study, two factors including 49 genotypes (44 test cross hybrids and 5 control treatments) and 5 drought stress levels (0, -2.5, -5, -7.5 and -10 bar) were analyzed using a factorial experiment based on completely randomized design with three replications. The field study was conducted based on a square lattice design (7 x 7) with three replications. The results showed that genotypes and different stress levels had significant differences for germination percent, radicle, plumule length, and fresh and dry weight of radicle and plumule. Drought tolerant genotypes under lab conditions (genotypes number 1, 10, 22, 23, 32, 41 and 49) were superior to other groups with mean traits of germination percent, and dry weight of plumule and radicle of 43.29%, 4.22 µg and 2.75 µg. In terms of field traits, the drought tolerant group (genotypes number 11, 15, 19, 21 and 43) with white sugar yield of 10.18 t ha^-1 was superior to the sensitive group with 5.84 t ha^-1 of white sugar yield. The cluster analysis showed the sugar beet genotypes were subdivided into 5 and 4 groups based on traits studied in the lab and field, respectively. These results emphasis on genetic variation for drought tolerance amongst the studied genotypes. Percent of germination and radicle dry weight under stress conditions can be employed as traits that are effective for selection of drought tolerant genotypes under field conditions.

Keywords

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Environmental Stresses in Crop Sciences

Investigation on sugar beet test cross genotypes variation for seedling and field characteristics under drought stress conditions

References

References

Volume 8, Issue 2 - Serial Number 2
March 2016
Pages 233-247

Investigation on sugar beet test cross genotypes variation for seedling and field characteristics under drought stress conditions

References

References

Volume 8, Issue 2 - Serial Number 2March 2016Pages 233-247

Volume 8, Issue 2 - Serial Number 2
March 2016
Pages 233-247