TY  - JA
AU  - Huihui Li
AU  - Sukhwinder-Singh
AU  - Bhavani,S.
AU  - Singh,R.P.
AU  - Sehgal,D.
AU  - Basnet,B.R.
AU  - Vikram,P.
AU  - Burgueño,J.
AU  - Huerta-Espino,J.
TI  - Identification of genomic associations for adult plant resistance in the background of popular South Asian wheat cultivar, PBW343
PY  - 2016///
CY  - Switzerland : 
PB  - Frontiers
KW  - Wheat
KW  - AGROVOC
KW  - Quantitative Trait Loci
KW  - Rusts
KW  - Food security
KW  - Chromosome mapping
KW  - Yields
N1  - Peer review; Open Access
N2  - Rusts, a fungal disease as old as its host plant wheat, has caused havoc for over 8000 years. As the rust pathogens can evolve into new virulent races which quickly defeat the resistance that primarily rely on race specificity, adult plant resistance (APR) has often been found to be race non-specific and hence is considered to be a more reliable and durable strategy to combat this malady. Over decades sets of donor lines have been identified at International Maize and Wheat Improvement Center (CIMMYT) representing a wide range of APR sources in wheat. In this study, using nine donors and a common parent “PBW343,” a popular Green Revolution variety at CIMMYT, the nested association mapping (NAM) population of 1122 lines was constructed to understand the APR genetics underlying these founder lines. Thirty-four QTL were associated with APR to rusts, and 20 of 34 QTL had pleiotropic effects on SR, YR and LR resistance. Three chromosomal regions, associated with known APR genes (Sr58/Yr29/Lr46, Sr2/Yr30/Lr27, and Sr57/Yr18/Lr34), were also identified, and 13 previously reported QTL regions were validated. Of the 18 QTL first detected in this study, 7 were pleiotropic QTL, distributing on chromosomes 3A, 3B, 6B, 3D, and 6D. The present investigation revealed the genetic relationship of historical APR donor lines, the novel knowledge on APR, as well as the new analytical methodologies to facilitate the applications of NAM design in crop genetics. Results shown in this study will aid the parental selection for hybridization in wheat breeding, and envision the future rust management breeding for addressing potential threat to wheat production and food security
UR  - http://hdl.handle.net/10883/18128
DO  - https://doi.org/10.3389/fpls.2016.01674
T2  - Frontiers in Plant Science 
ER  -