000			04174nab a22005177a 4500
001			G66159
003			MX-TxCIM
005			20240919021139.0
008			121211b |||p||p||||||| |z||| |
022			_a1573-5060 (Revista en electrónico)
040			_aMX-TxCIM
090			_aLook _bunder journal title
100	1		_aSingh, R.P. _gGlobal Wheat Program _8INT0610 _9825
245	0	0	_aComparison of two crossing and four selection schemes for yield, yield-traits, and slow rusting resistance to leaf rust in wheat
260			_c1998
340			_aPrinted
500			_aPeer-review: Yes - Open Access: Yes|http://science.thomsonreuters.com/cgi-bin/jrnlst/jlresults.cgi?PC=MASTER&ISSN=0014-2336
520			_aThe most important breeding objectives in crop improvement are improving grain yield, grain quality, and resistances to various biotic and abiotic stresses. The objectives of our study were to compare two crossing and four selection schemes for grain yield, yield traits, and slow rusting resistance to leaf rust (Puccinia recondita) based on additive genes in wheat (Triticum aestivum), and to identify the most efficient crossing and selection methodologies in terms of genetic gains and cost efficiency. Segregating populations were derived from 18 simple crosses and the same number of top (three-way) crosses. Half of the crosses were derived from Yecora 70 and the other half from Veery #10 as the common leaf rust susceptible parents. The four selection schemes were: pedigree, modified bulk (F-2 and F-1-top as pedigree, selected lines in F-3, F-4, F-2-top, F-3-top as bulk, and pedigree in F-5 and F-4-top populations), selected bulk (selected plants in F-2, F-3, F-4, F-1-top, F-2-top and F-3-top as bulk; and pedigree in F-5 and F-4-top populations), and nonselected bulk (bulk in F-2, F-3, F-4, F-1-top, F-2-top and F-3-top; and pedigree in F-5 and F-4-top populations). A total of 320 progeny lines, parents and checks were tested for grain yield, other agronomic traits and leaf rust resistance during the 1992/93 and 1993/94 seasons in Ciudad Obregon (Sonora State, Mexico) which represents a typical high yielding irrigated site. The influence of the type of cross and the selection scheme on the mean grain yield and other traits of the progenies was minimal. The selection of parents was the most important feature in imparting yield potential and other favourable agronomic traits. Moreover, the highest yielding lines were distributed equally. Progeny lines derived from Veery #10 crosses had significantly higher mean grain yield compared to those derived from the Yecora 70 crosses. Furthermore, a large proportion of the highest yielding lines also originated from Veery #10 crosses. Mean leaf rust severity of the top cross progenies was lower than that of the simple cross progenies possibly because two parents contributed resistance to top cross progenies. Mean leaf rust severity of the nonselected bulk derivatives was twice that of lines derived from the other three schemes. Selected bulk appears to be the most attractive selection scheme in terms of genetic gains and cost efficiency.
536			_aGlobal Wheat Program
546			_aEnglish
591			_a9804|Springer|EE|R98-99ANALY|1
594			_aINT0610|N1203511
595			_aCSC
595			_aSC
650	1	7	_aDisease resistance _gAGROVOC _2 _91077
650	1	7	_aPlant diseases _gAGROVOC _2 _91206
650	1	0	_aPuccinia
650	1	0	_aPuccinia recondita
650	1	0	_aResearch projects _91237
650	1	7	_aRusts _gAGROVOC _2 _91251
650	1	0	_aSelection
650	1	0	_91265 _aSoft wheat _gAGROVOC
650	1	0	_aYield components _91312
653	0		_aCIMMYT
650	1	7	_aTriticum _gAGROVOC _2 _91295
650	1	0	_91296 _aTriticum aestivum _gAGROVOC
650	1	7	_aWheat _gAGROVOC _2 _91310
650	1	0	_91313 _aYields _gAGROVOC
650	1	7	_aPlant breeding _gAGROVOC _2 _91203
700	1		_aMiranda, A., _ecoaut.
700	1		_aHuerta-Espino, J. _gGlobal Wheat Program _8CHUE01 _9397
700	1		_9969 _aAutrique, E. _gGlobal Wheat Program _8N1203511 _ecoaut.
773	0		_tEuphytica _gv. 100, no. 1-3, p. 35-43
700	1		_9661 _aRajaram, S. _ecoaut.
942			_cJA
999			_c19017 _d19017