000			03284nab|a22004097a|4500
999			_c63449 _d63441
001			63449
003			MX-TxCIM
005			20211006082047.0
008			201911s2019||||xxk|||p|op||||00||0|eng|d
022			_a0305-7364
022			_a1095-8290 (Online)
024	8		_ahttps://doi.org/10.1093/aob/mcz041
040			_aMX-TxCIM
041			_aeng
100	0		_aLong Li _99678
245	1	0	_aGenome-wide association study reveals genomic regions controlling root and shoot traits at late growth stages in wheat
260			_aUnited Kingdom : _bOxford University Press, _c2019.
500			_aPeer review
500			_aOpen Access
520			_aBackground and Aims Root system morphology is important for sustainable agriculture, but the genetic basis of root traits and their relationship to shoot traits remain to be elucidated. The aim of the present study was to dissect the genetic basis of root traits at late growth stages and its implications on shoot traits in wheat. Methods Among 323 wheat accessions, we investigated phenotypic differences in root traits at booting and mid-grain fill stages in PVC tubes, shoot traits including plant height (PH), canopy temperature (CT) and grain yield per plant (YPP) in a field experiment, and performed a genome-wide association study with a Wheat 660K SNP Array. Key Results Deep-rooted accessions had lower CT and higher YPP than those with shallow roots, but no significant relationship was identified between root dry weight and shoot traits. Ninety-three significantly associated loci (SALs) were detected by the mixed linear model, among which three were hub SALs (Co-6A, Co-6B and Co-6D) associated with root depth at both booting and mid-grain fill stages, as well as CT and YPP. Minirhizotron system scanning results suggested that the causal genes in the three SALs may regulate root elongation in the field. The heritable independence between root depth and PH was demonstrated by linkage disequilibrium analysis. The YPP was significantly higher in genotypes which combined favourable marker alleles (FMAs) for root depth and PH, suggesting that a deep root and shorter plant height are suitable traits for pyramiding target alleles by molecular marker-assisted breeding. Conclusions These results uncovered promising genomic regions for functional gene discovery of root traits in the late growth period, enhanced understanding of correlation between root and shoot traits, and will facilitate intensive study on root morphology and breeding through molecular design.
546			_aText in English
650		7	_aRoots _2AGROVOC _91755
650		7	_aShoots _2AGROVOC _917170
650		7	_aGenomes _gAGROVOC _2 _91131
650		7	_aWheat _gAGROVOC _2 _91310
650		7	_aGenetics _2AGROVOC _91130
650		7	_aTriticum aestivum _2AGROVOC _91296
700	0		_aZhi Peng _917918
700	0		_aXinguo Mao _94593
700	0		_aJingyi Wang _94594
700	0		_aXiaoping Chang _94598
700	1		_aReynolds, M.P. _gGlobal Wheat Program _8INT1511 _9831
700	0		_aRuilian Jing _92023
773	0		_tAnnals of Botany _gv. 124, no. 6, p. 993-1006 _dUnited Kingdom : Oxford University Press, 2019. _x0305-7364 _wGu444496
856	4		_yOpen Access through DSpace _uhttps://hdl.handle.net/10883/21288
942			_cJA _n0 _2ddc