NDLI: Introgression of group 4 and 7 chromosomes of Ae. peregrina in wheat enhances grain iron and zinc density

Content Provider	Springer Nature Link
Author	Neelam, Kumari Rawat, Nidhi Tiwari, Vijay K. Kumar, Sundip Chhuneja, Parveen Singh, Kuldeep Randhawa, Gursharn S. Dhaliwal, Harcharan S.
Copyright Year	2010
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 (2n = 28, U$^{P}$U$^{P}$S$^{P}$S$^{P}$), selected for high grain iron and zinc concentration were crossed with Triticum aestivum L. cv. Chinese Spring (Ph $^{ I }$). The sterile F$_{1}$ hybrids were backcrossed with elite wheat cultivars to get fertile BC$_{2}$F$_{2}$ derivatives. Some of the fertile BC$_{2}$F$_{2}$ 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$^{P}$ chromosomes in five selected derivatives, 7U$^{P}$ in four, group 4 and 4S$^{P}$ in three and a translocated 5U$^{P}$ of Ae. peregrina in one of the selected derivatives. Molecular marker analysis using the introgressed chromosome markers indicated that two of the BC$_{2}$F$_{3}$ 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.
Starting Page	623
Ending Page	634
Page Count	12
File Format	PDF
ISSN	13803743
Journal	Molecular Breeding
Volume Number	28
Issue Number	4
e-ISSN	15729788
Language	English
Publisher	Springer Netherlands
Publisher Date	2010-11-04
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Iron Zinc Wheat Ae. peregrina Introgression SSR markers GISH Plant Physiology Plant Genetics & Genomics Plant Sciences Biotechnology Plant Pathology
Content Type	Text
Resource Type	Article
Subject	Genetics Plant Science Molecular Biology Biotechnology Agronomy and Crop Science

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