000			03530nab|a22005417a|4500
001			68753
003			MX-TxCIM
005			20251223131109.0
008			20254s2025||||mx |||p|op||||00||0|eng|d
022			_a1471-2229
024	8		_ahttps://doi.org/10.1186/s12870-025-06498-7
040			_aMX-TxCIM
041			_aeng
100	0		_aPeng Ma _919671
245	1	0	_aUnveiling the heterosis pattern of modern maize breeding in Southwest China through population structure and genetic diversity analysis
260			_aUnited Kingdom : _bBioMed Central Ltd,, _c2025.
500			_aPeer review
500			_aOpen Access
520			_aMaize (Zea mays L.) is an important food crop throughout the world and is also one of the earliest crops to use heterosis. In this study, we evaluated the genetic diversity, population structure, and selective sweep of 100 elite inbred maize lines collected from the current breeding program in Sichuan province, Southwest China, using 5,261,175 high-quality single nucleotide polymorphisms (SNPs). We discovered an abundance of genetic diversities and classified them into four groups. By combining kinship relationships, these groups were further divided into Tropic-local A, Improved-tropic, Tropic-local B, and Improved-local. Genomic differentiation was assessed using Fst values (0.21-0.44) as well as genetic diversity (pi = 6.07 x 10-4 - 6.61 x 10-4). We generated 900 (90 x 10) hybrids using 90 and 10 inbred maize lines from 100 diverse maize germplasms. All hybrids were evaluated for 10 traits in three replicate tests across two locations. We found that the patterns of G1 x G3, G1 x G4, G2 x G3, and G3 x G4 exhibited significant heterosis in yield-related traits and have been used in commercial breeding. In addition, we also explored the relationship between 10 traits of hybrid offspring and the number of heterozygous SNP. Under most heterosis modes, the best linear unbiased estimation (BLUE) value of the trait was highly consistent with the trend of deleterious SNPs, but there was a deviation in the G1 x G3 mode. Taken together, the results provide insight into the utilization of the current maize germplasm in Sichuan province to improve hybrid breeding.
546			_aText in English
597			_dChina Agricultural Research System (CARS) _dSichuan Provincial Science and Technology Program _fBreeding for Tomorrow _uhttps://hdl.handle.net/10568/179257
650		7	_aMaize _2AGROVOC _91173
650		7	_aBreeding _2AGROVOC _91029
650		7	_aSingle nucleotide polymorphisms _2AGROVOC _910805
650		7	_aCombining ability _2AGROVOC _92367
650		7	_aHeterosis _2AGROVOC _91145
650		0	_aGenetic diversity (resource) _92974 _2AGROVOC
651		7	_aChina _2AGROVOC _93990
700	0		_aHua Zhang _98153
700	0		_aHongxia Shui _938741
700	0		_aXuecai Zhang _gGlobal Maize Program _8INT3400 _9951
700	0		_aXiuquan Wang _923623
700	0		_aShibin Gao _98403
700	0		_aHaiying Zhang _919676
700	0		_aZhi Nie _938742
700	0		_aChunyan Qing _938743
700	0		_aTingqi Lu _923624
700	0		_aQihua Pang _938744
700	0		_aWenzheng Pei _938745
700	0		_aHongmei Chen _938746
700	0		_aChenyan He _938747
700	0		_aBowen Luo _919673
700	0		_aDan He _938748
773	0		_tBMC Plant Biology _gv. 25, no. 1, art. 477 _dUnited Kingdom : BioMed Central Ltd., 2025. _x1471-2229 _wG79387
856	4		_yOpen Access through DSpace _uhttps://hdl.handle.net/10883/35634
942			_cJA _n0 _2ddc
999			_c68753 _d68745