TY - JOUR
T1 - Assessment of synthetic hexaploid wheats in response to heat stress and leaf rust infection for the improvement of wheat production
AU - Truong, Hai An
AU - Lee, Won Je
AU - Kishii, Masahiro
AU - Hong, Suk Whan
AU - Kang, Chon Sik
AU - Lee, Byung Cheon
AU - Lee, Hojoung
PY - 2019/1/1
Y1 - 2019/1/1
N2 - Bread wheat (Triticum aestivum L.) is a popular cereal crop worldwide, but its future use is threatened by its limited genetic diversity because of the evolutionary bottleneck limiting its ability to combat abiotic and biotic stresses. However, synthetic hexaploid wheat (SHW) is known for its genetic diversity resulting from of the artificial crossing used to transfer elite genes from donors. SHW is therefore a potential source for genetic variations to combat stress. We studied two SHW lines from CYMMIT (cSHW339464 and cSHW339465) and a Korean bread wheat (cv. KeumKang) to determine their ability to tolerate heat stress and leaf rust infection. Our results showed that cSHW339464 could tolerate heat stress because of its maintained-green phenotype, high accumulation of anthocyanin, antioxidant activity (DPPH), proline content, and the response of heat-shock proteins after being challenged by heat stress. On the other hand, cSHW339465 is resistant to leaf rust and can inhibit the growth of pathogens on the leaf surface, owing to the induction of genes encoding β-1,3-glucanase and peroxidase and subsequent enzyme activities. In conclusion, these two SHW lines could prove good candidates contributing to the improvement of current wheat resources.
AB - Bread wheat (Triticum aestivum L.) is a popular cereal crop worldwide, but its future use is threatened by its limited genetic diversity because of the evolutionary bottleneck limiting its ability to combat abiotic and biotic stresses. However, synthetic hexaploid wheat (SHW) is known for its genetic diversity resulting from of the artificial crossing used to transfer elite genes from donors. SHW is therefore a potential source for genetic variations to combat stress. We studied two SHW lines from CYMMIT (cSHW339464 and cSHW339465) and a Korean bread wheat (cv. KeumKang) to determine their ability to tolerate heat stress and leaf rust infection. Our results showed that cSHW339464 could tolerate heat stress because of its maintained-green phenotype, high accumulation of anthocyanin, antioxidant activity (DPPH), proline content, and the response of heat-shock proteins after being challenged by heat stress. On the other hand, cSHW339465 is resistant to leaf rust and can inhibit the growth of pathogens on the leaf surface, owing to the induction of genes encoding β-1,3-glucanase and peroxidase and subsequent enzyme activities. In conclusion, these two SHW lines could prove good candidates contributing to the improvement of current wheat resources.
KW - anthocyanin
KW - bread wheat
KW - breading material
KW - peroxidase
UR - http://www.scopus.com/inward/record.url?scp=85074292003&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85074292003&partnerID=8YFLogxK
U2 - 10.1071/CP19111
DO - 10.1071/CP19111
M3 - Article
AN - SCOPUS:85074292003
VL - 70
SP - 837
EP - 848
JO - Crop and Pasture Science
JF - Crop and Pasture Science
SN - 1836-0947
IS - 10
ER -