000			02790nam a22004337a 4500
001			G79285
003			MX-TxCIM
005			20211006073336.0
008			121211s ||||f| 0 p|p||0|| |
020			_a970-648-095-1
040			_aMX-TxCIM
072		0	_aE16
072		0	_aF01
072		0	_aH20
082	0	4	_a632.3 _bHEN
100	1		_aMakkouk, K.M. _uBarley Yellow Dwarf Disease: Recent Advances and Future Strategies
111	2		_aProceedimgs of an International Symposium _cTexcoco, Mex. (Mexico) _d1-5 Sep 2002 _9994
245	0	0	_aEstimating yield losses in cereals infected with barley yellow dwarf virus
260			_aMexico, DF (Mexico) _bCIMMYT : _c2002
300			_ap. 55-57
340			_aPrinted
520			_aUsing a prediction model to estimate yield losses due to barley yellow dwarf virus (BYDV; family Luteoviridae) infection, thus avoiding the need for a healthy control, could facilitate germplasm screening and reduce evaluation costs. In the 1999/2000 growing season, 69 barley, 58 spring and winter/facultative bread wheat, and 39 durum wheat lines derived from the ICARDA (barley) and CIMMYT/ICARDA (wheat) improvement programs were evaluated for their resistance/tolerance to BYDV in artificially inoculated plots. Similarly, in the 2000/2001 growing season, 24 barley, 45 spring and winter/facultative bread wheat, and 31 durum wheat lines were evaluated. Many of these lines yielded well in response to infection when compared with control plots (non-inoculated and protected by insecticide treatment). A model developed earlier for spring bread wheat in Canada to predict yield losses due to BYDV infection based on symptom score (0-9) and plant height (cm) [predicted yield index (PYl) = 600 (0.2- symptom score/height)] was evaluated. Experiments conducted during 1999/2000 indicated that correlation between PYI and percent yield loss was r= -0.665, --0.080 and -0.304 for barley, bread wheat, and durum wheat, respectively. In the 2000/2001 trials, correlation between PYI and percent yield loss was -0.88, -0.31 and -0.41, for the three crops respectively. It can be concluded that this prediction model is reliable for BYDV screening in barley but less so in bread or durum wheat, under growing conditions in northern Syria.
546			_aEnglish
591			_a0208|AGRIS 0401|AL-Wheat Program|R02CIMPU
593			_aJuan Carlos Mendieta
595			_aCPC
650	1	0	_aBarley yellow dwarf virus _91019
650	1	0	_aBread _91027
650	1	0	_aCereal crops
650	1	0	_aGrain yield _91339
650	1	0	_aInfection
650	1	7	_aPlant diseases _gAGROVOC _2 _91206
650	1	0	_aRhopalosiphum padi _91242
650	1	0	_aWheat
650	1	0	_aYield factors
700	1		_aGhulam, W., _ecoaut.
700	1		_aHenry, M.|McNab, A. _eeds.
942			_cBK
999			_c5775 _d5775