000			03894nab|a22004217a|4500
001			66974
003			MX-TxCIM
005			20240317033122.0
008			240110s2024 ne |||p|op||| 00| 0 eng d
022			_a0378-4290
024	8		_ahttps://doi.org/10.1016/j.fcr.2023.109220
040			_aMX-TxCIM
041			_aeng
100	0		_aLong Li _99678
245	1	2	_aInsights into progress of wheat breeding in arid and infertile areas of China in the last 14 years
260			_aAmsterdam (Netherlands) : _bElsevier, _c2024.
500			_aPeer review
520			_aContext: or problem: Wheat (Triticum aestivum L.) is a major cereal crop driving food security, but its production is hampered by drought and low soil fertility, which are worsening due to climate change. Understanding genetic gain and its closely related traits of wheat varieties in arid areas will provide a meaningful reference for optimizing breeding strategies. Objectives: This study aims to evaluate the genetic yield gain of wheat breeding materials based on robust data from National Wheat Regional Trials in arid and infertile areas of China over the past 14 years, and screened agronomic traits that contributed to grain yield (GY) increase. Methods: The trials were conducted at 17 sites in five provinces with Jinmai 47 as the check variety. The temporal variation trends of GY were assessed by regression analysis using the GY of Jinmai 47 as the covariate. The analysis of Pearson's correlation, path coefficient, and principal component were performed to investigate the association between GY and agronomic traits. Results: Average GY of advanced lines (ALs) and certified varieties (CVs) were 4377.3 kg ha−1 and 4647.7 kg ha−1, respectively and the breeding-driven yield gains of ALs and CVs were estimated as 28.2 kg ha−1 year−1 and 17.8 kg ha−1 year−1, accounting for 36.1% and 28.3% of the total observed yield gain, respectively. The effective spike number (ESN) and plant height (PH) are important causal traits leading to yield differences among ALs, and have pyramiding effect on GY. Remarkably, modern breeding practices have conducted positive selection for ESN and negative selection for PH. The yield stability of ALs exhibited an increasing trend, implying that genetic variations favorable for yield potential and adaptability could be pyramided by breeding. Moreover, Jinmai 47 has maintained its advantage in terms of yield stability, ranking in the top three of all ALs in nine years of trials. Conclusions: In arid and infertile areas of China during 2007–2020, approximately one-third of wheat yield gains rely on genetic yield potential improvement, and ESN and PH were the key traits confer yield gap among ALs. Jinmai 47 is an excellent germplasm resource with high and stable yield that may provide essential gene pool for wheat improvement. Implications or signifcance: This study reveals the current wheat breeding situation in terms of yield and agronomic traits in the arid and infertile areas of China, and provides valuable information for the development and deployment of new-generation wheat varieties.
546			_aText in English
650			_aAgronomic traits
650		7	_aWheat _2AGROVOC _91310
650		7	_aYields _2AGROVOC _91313
650		7	_aYield stability _2AGROVOC _932749
651		7	_2AGROVOC _93990 _aChina
700	0		_aJingyi Wang _94594
700	0		_aChaonan Li _917919
700	0		_aXinguo Mao _94593
700	0		_aXiaoqing Zhang _932750
700	0		_aJunwei Sun _932751
700	0		_aKe Zhang _932752
700	0		_aYuping Liu _919741
700	1		_aReynolds, M.P. _8INT1511 _9831 _gGlobal Wheat Program
700	0		_aZiguang Yang _932753
700	0		_aRuilian Jing _92023
773	0		_tField Crops Research _gv. 306, art. 109220 _dAmsterdam (Netherlands) : Elsevier, 2024. _x0378-4290 _wG444314
942			_cJA _n0 _2ddc
999			_c66974 _d66966