000			03245nab|a22002777a|4500
999			_c61778 _d61770
001			61778
003			MX-TxCIM
005			20240919021228.0
008			200501s2020||||ne |||p|op||||00||0|eng|d
022			_a0378-4290
024	8		_ahttps://doi.org/10.1016/j.fcr.2020.107782
040			_aMX-TxCIM
041			_aeng
100	1		_aFischer, R.A. _97390
245	1	0	_aBreeding wheat for increased potential yield : _bcontrasting ideas from Donald and Fasoulas, and the case for early generation selection under nil competition
260			_aAmsterdam (Netherlands) : _bElsevier, _c2020.
500			_aPeer review
520			_aThe paper refers to spring wheat breeding for potential yield, yield in the absence of manageable stresses, under irrigated low latitude conditions, representing a major environment for wheat production. Initially it discusses two propositions both over 50 years old. Donald argued that for greater yield, early generation selection should target uncompetitive plant traits or ?communal? plants. In contrast, Fasoulas proposed the opposite, namely selection of plants with high yield under nil-competition, aided by the use of a honeycomb design to control for soil variation. Despite some promising results, the absence of definitive proof of the relevance to yield breeding of either concept, wheat breeders have generally opted for an intermediate approach with focus on measuring yield in plots as early as possible. They have been successful but yield progress is slowing. The advent of seeding machinery permitting regular planting patterns through seed singulation, and the reporting of optimal densities for maximum yield per hectare as low as 20 plants/m2 under irrigation and excellent management in northwest Mexico (Fischer et al., 2019), suggest that Fasoulas's method needs reinvestigating at least for wheat. Yield crossovers (i.e. genotype rank changes) with increasing plant density from the very low density for nil-competition (around 1.4/m2) are expected to be less likely if the target crop density is as low as say 20/m2. There are enough unknowns in the physiology of the wheat crop response to density to suggest that this is quite possible. The approach opens up new possibly more efficient strategies for early generation (e.g. F2) selection for potential yield and could give greater yield progress per unit cost. It would be especially suited for hybrid wheat breeding and production systems. Finally the paper discusses, in the light of the advances in precision agriculture, the opportunities for the agronomy of crops and breeding-nurseries based on low-density honeycomb planting. The major challenge, namely weed control, is manageable.
536			_aThe northwest Mexican wheat research reported here was supported by the International Maize and Wheat Improvement Center (CIMMYT), and the thinking time by the Commonwealth Scientific and Industrial Research Organization (CSIRO).
546			_aText in English
650		7	_2AGROVOC _91134 _aGenotypes
650		7	_aPlant breeding _gAGROVOC _2 _91203
650		7	_aWheat _gAGROVOC _2 _91310
773	0		_tField Crops Research _gv. 252, art. 107782 _dAmsterdam (Netherlands) : Elsevier, 2020. _x0378-4290 _wu444314
942			_cJA _n0 _2ddc