Mapping of QTLs affecting copper tolerance and the Cu, Fe, Mn and Zn contents in the shoots of wheat seedlings

Abstract

Quantitative trait loci (QTLs) for Cu-tolerance were determined in wheat grown in control and Cu-treated soil in greenhouse. In addition, loci having an influence on the shoot Cu-, Fe-, Mn-and Zn-contents under non-stressed and Cu-stressed environments were mapped. One major QTL for Cu-tolerance was found on chromosome 5DL, while slighter effects were determined on the chromosomes 1AL, 2DS, 4AL, 5BL and 7DS. QTLs affecting the shoot Mn-and Zn-contents were found on the chromosomes 3BL and 3AL, respectively. The centromeric region on the chromosome 3B plays a role in the regulation of the shoot Fe-contents in the stressed plants. Under Cu-stress QTL affecting shoot Cu-content was found on chromosome 1BL, while on the chromosome 5AL a QTL influencing the Cu-accumulation ability of wheat from Cu-polluted soil was determined.Additional key words: micronutrients, phytoremediation, shoot heavy metal content, Triticum aestivum L.

QTLs mapping of physiological traits related to salt tolerance in young rice seedlings

“…Modern techniques of molecular biology (Bassam et al 1991, Saghi Maroof et al 1994, Creste et al 2001) and the mapping of rice genome (Chen et al 1997, Temnykh et al 2000, McCouch et al 2002 allow plant scientists to locate the DNA determining the physiological trait that dictate salt tolerance in rice. QTL analysis of physiological traits related to abiotic stresses has been conducted by several researchers (Zhang et al 1995, Koyama et al 2001, Lin et al 2004, Ming et al 2005, Lee et al 2007, Balint et al 2007). Lin et al (2004) reported two major QTLs with very large effects on shoot Na + content (qNA-7) and shoot K + content (qK-1).…”

Responses of Camellia sinensis cultivars to Cu and Al stress

“…In germinating rice seeds copper stress caused a differential expression of 25 proteins and majority of these proteins were antioxidants or stressrelated proteins (Ahsan et al 2007). Quantitative trait loci (QTLs) affecting the copper tolerance in wheat have also been mapped recently (Bálint et al 2007). …”

GISH reveals different levels of meiotic pairing with wheat for individual Aegilops biuncialis chromosomes

“…speltoides, respectively (McIntosh et al 1982, Gold et al 1999. QTLs for shoot Mn and Cu contents (Bálint et al 2007), for resistance to Fusarium head blight in wheat (Waldron et al 1999) and for resistance to leaf rust (Lr24) in Agropyron elongatum have also been identified on the homoeologous group 3 (Friebe et al 1996a,b). Important QTLs for physiological traits involved in drought tolerance (such as osmotic adjustment and water use efficiency) were also identified on homoeologous group 7 in wheat and barley (Cattivelli et al 2002).…”