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Development of near isogenic lines for grain softness through marker assisted backcross breeding in wheat

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Abstract

The genes for grain softness and rust resistance were transferred from a soft grained Australian wheat variety (Barham) to a hard grained Indian wheat variety (DBW14) through marker assisted back cross breeding. Backcrosses were made with recurrent parent in the BC1F1 plants that were found positive for markers of Pina-D1a, Pina-D1b and Lr37b genes. The BC2F1 plants were further screened and those that possessed the PinaD1a and Lr37b alleles were advanced up to BC2F4 with continued marker assisted selection and field screening. 48 SSR markers that were heterozygous in the BC1F1 plants were used for background selection in three BC2F1 plants derived from three respective BC1F1s. Further generations were screened for morphological traits in the field and 16 BC2F4 lines were finally selected through combined field and marker screening. These 16 near isogenic lines (NILs) had lower grain hardness index (13.86–47.13) than the recurrent parent DBW 14 (81.76) and displayed more than 95% of the recurrent parent genome. 12 of the NILs had significantly higher grain yield than DBW 14. Combined foreground and background selection strategy coupled with field screening, was thus, found to be an effective strategy for transferring grain softness in wheat.

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Datasets supporting the conclusion of this article are included within the article and material available on request from the corresponding authors.

Abbreviations

AACC:

American Association of Cereal Chemists

ACI:

Average coefficient of infection

ANOVA:

Analysis of variance

AT:

Augmented trials

DP:

Donor parent

GGT:

Graphical geno type

GHI:

Grain hardness index

GY:

Grain yield

IARI:

Indian Agricultural Research Institute

IIWBR:

Indian Institute of Wheat and Barley Research

MABC:

Marker assisted back cross

MAS:

Marker assisted selection

NEPZ:

North Eastern Plane Zone

NIL:

Near isogenic line

PH:

Plant height

RP:

Recurrent parent

RPG:

Recurrent parent genome recovery

SKCS:

Single Kernel characterization system

TKW:

Thousand Kernel weight

TW:

Test weight

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Acknowledgements

AMS acknowledges the funding provided by Indian Council of Agricultural Research, New Delhi and Indian Agricultural Research Institute, New Delhi in the in-house project for carrying out this work. TPJK acknowledges the YP-II fellowship granted to him by the Indian Council of Agricultural Research for carrying out the work as part of his Ph.D. thesis.

Funding

This work was supported by Indian Council of Agricultural Research (ICAR), New Delhi.

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Contributions

All authors contributed significantly in the planning, coordination, conduct of the field experiments, data collection, tabulation, field and molecular analysis, interpretation and writing of the manuscript.

Corresponding author

Correspondence to Anju Mahendru-Singh.

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The authors declare that they have no competing interests.

Ethical standards

All experiments complied with the current laws of India, the country in which they were performed.

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Kumar, T.P.J., Rai, A., Singh, S.K. et al. Development of near isogenic lines for grain softness through marker assisted backcross breeding in wheat. J. Plant Biochem. Biotechnol. 31, 410–420 (2022). https://doi.org/10.1007/s13562-021-00712-x

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  • DOI: https://doi.org/10.1007/s13562-021-00712-x

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