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- Title
Introgression of group 4 and 7 chromosomes of Ae. peregrina in wheat enhances grain iron and zinc density.
- Authors
Neelam, Kumari; Rawat, Nidhi; Tiwari, Vijay; Kumar, Sundip; Chhuneja, Parveen; Singh, Kuldeep; Randhawa, Gursharn; Dhaliwal, Harcharan
- Abstract
Dietary deficiency of iron and zinc micronutrients affects more than two billion people worldwide. Breeding for micronutrient-dense crops is the most sustainable and cost-effective approach for alleviation of micronutrient malnutrition. Three accessions of Aegilops peregrina (Hack.) Maire & Weill (2 n = 28, UUSS), selected for high grain iron and zinc concentration were crossed with Triticum aestivum L. cv. Chinese Spring ( Ph). The sterile F hybrids were backcrossed with elite wheat cultivars to get fertile BCF derivatives. Some of the fertile BCF derivatives showed nearly 100% increase in grain iron and more than 200% increase in grain zinc concentration compared to the recipient wheat cultivars. The development of derivatives with significantly higher grain micronutrients, high thousand-grain weight and harvest index suggests that the enhanced micronutrient concentration is due to the distinct genetic system of Ae. peregrina and not to the concentration effect. Genomic in situ hybridization, comparison of introgressed chromosomes with the standard karyotype of Ae. peregrina and simple sequence repeat marker analysis revealed the introgression of 7S chromosomes in five selected derivatives, 7U in four, group 4 and 4S in three and a translocated 5U of Ae. peregrina in one of the selected derivatives. Molecular marker analysis using the introgressed chromosome markers indicated that two of the BCF progenies were stabilized as disomic addition lines. It could, therefore, be concluded that the group 4 and 7 chromosomes of Ae. peregrina carry the genes for high grain iron and zinc concentration.
- Subjects
PLANT chromosomes; FIBER deficiency diseases; MICRONUTRIENTS; MALNUTRITION; WHEAT genetics; COST effectiveness; GENETIC markers
- Publication
Molecular Breeding, 2011, Vol 28, Issue 4, p623
- ISSN
1380-3743
- Publication type
Article
- DOI
10.1007/s11032-010-9514-1