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20181
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Subject: Genetics and Plant Breeding × Author: Ramandeep Kaur × End date: 2018 × Start date: 2000 × Type: Thesis × Thesis Type: M.Sc ×
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    Genotypic variation for phytic acid content in wheat lines with high grain micronutrient
    (Punjab Agricultural University, Ludhiana, 2018) Ramandeep Kaur; Sohu, V. S.
    The present study was conducted to identify lines with enhanced micronutrients along with low phytic acid content in wheat. A set of 210 BC1F3 and 210 BC2F3 wheat backcross derivatives generated by crossing advanced backcross lines of T. durum having grain zinc QTL introgressed from T. monococcum and T. boeoticum with high yielding varieties as a recipient parent, were taken as a base material to assess the variation for phytic acid content. Among wheat backcross lines, 107 genotypes from BC1F3 and 93 genotypes from BC2F3 progenies were shortlisted on the basis of high grain iron and zinc concentration and rust resistance. The phytic acid content of the shortlisted genotypes was assessed that ranged from 10.92 – 63.93 mg/g of whole wheat meal. From the shortlisted genotypes, 35 promising genotypes were further selected that had the combination of high grain iron concentration, high grain zinc concentration, low phytic acid content and rust resistance. The promising genotypes were sown for generation advancement in off season. BC1F5 and BC2F5 progenies having high grain micronutrient along with low phytic acid content were evaluated for morphological and grain quality parameters. The variation in the genotypes was significant for all the traits studied except the grain iron concentration. For the grain zinc concentration, the genotype from the cross WH1105*3/BF20 possessed highest zinc concentration among all the genotypes. The genotype from the cross PBW698*3/BF22 had lowest phytic acid content among all the genotypes and it had high zinc concentration as well. Although the genotype had combination of both the traits i.e. high grain zinc and low phytic acid content but it was low yielding. Analysis of variation and correlation studies showed that the genotypes which possessed high grain protein content and grain zinc concentration were low yielding with less number of grains per spike, late maturity and relatively more plant height. Phytic acid content did not show any significant correlation with traits studied suggesting the possibility of selection and breeding for low phytic acid content without any impact on other desired traits.