000			02818nam a22004937a 4500
001			G70428
003			MX-TxCIM
005			20211006075509.0
008			121211s ||||f| 0 p|p||0|| |
020			_a92-9146-058-3
040			_aMX-TxCIM
072		0	_aF01
072		0	_aH60
090			_aLook under series title
100	1		_aTaye Tessema _uRegional Wheat Workshop for Eastern, Central and Southern Africa, 10; University of Stellenbosch, South Africa; 14-18 Sep 1998 _9725
110	2		_aCentro Internacional de Mejoramiento de Maiz y Trigo (CIMMYT), Addis Ababa (Ethiopia)
245	0	0	_aScreening advanced bread wheat lines for grain yield potential under grass weed infestation
260			_aAddis Ababa (Ethiopia) _bCIMMYT : _c1999
340			_aPrinted
520			_aDuring 1997, a multi-location study was conducted to assess differences in grain yield (GY) potential, under conditions of high weed infestation in the field, among 20 genotypes of bread wheat previously selected for high GY potential under weed-free conditions. Avena sativum was used as a proxy for grass weeds. The GY of wheat varied from 982 to 1951 for the 20 genotype means {i.e., averaged across the 3 locations). The two recently-released cultivars HAR 1685 and HAR 604 were significantly higher yielding than all other entries in the trial with the exception of entry 19 ( advanced line HAR 1918): At one site (Holetta), oat biomass yield was significantly and negatively correlated with wheat seedlings m-2 (WSM), wheat biomass at tillering and anthesis, and wheat GY. This suggests that higher initial wheat seedling stands and more productive canopies for specific wheat genotypes facilitated the suppression of wild oat biomass production. Similarly, the density of oat panicles m-2 at maturity was negatively affected by WSM, wheat spikes m-2 at maturity , and wheat biomass at tillering and anthesis. Oat height at maturity was significantly related to wheat height at tillering and to wheat biomass at tillering.
536			_aGlobal Maize Program
546			_aEnglish
591			_a0007|AGRIS 0101|R99-00CIMPU|AL-Wheat Program
593			_aJose Juan Caballero
594			_aINT2937
595			_aCPC
650	1	0	_aEthiopia
650	1	0	_91138 _aGrain _gAGROVOC
650	1	0	_aGrasses
650	1	0	_aHerbicides _gAGROVOC _91808
650	1	0	_aInfestation
650	1	0	_aPlant production _91212
650	1	0	_aSelection
650	1	7	_aVarieties _gAGROVOC _2 _91303
650	1	0	_aWeeds _91309
653	0		_aCIMMYT
650	1	7	_aTriticum _gAGROVOC _2 _91295
650	1	0	_91313 _aYields _gAGROVOC
650	1	0	_91134 _aGenotypes _gAGROVOC
700	1		_aAsefa Taa, _ecoaut. _9416
700	1		_9876 _aAmsal Tesfaye Tarekegne _gGlobal Maize Program _8INT2937 _ecoaut.
700	1		_9724 _aTanner, D.G. _ecoaut.
942			_cPRO
999			_c4501 _d4501