000			02710nab a22003137a 4500
001			65040
003			MX-TxCIM
005			20220209143517.0
008			220208s2022||||ke |||p|op||||00||0|eng|d
022			_a1996-0824 (online)
040			_aMX-TxCIM
041			_aeng
100	1		_910897 _aMuluneh, G.
245	1	0	_aClassifying highland quality protein maize in bred lines into heterotic groups
260			_aNairobi (Kenya) : _bAcademic Journals, _c2021.
500			_aOpen Access
520			_aEfforts to boost maize productivity can be undertaken through systematic management of heterosis. Combining ability test is a critical step towards identifying a heterotic group of new parental lines. Different heterotic grouping methods has been used by different researchers. Among these, SCA and hybrid mean, hybrid index, combined use of amplified fragment length polymorphism (AFLP), SSR markers and heterotic group’s specific and general combining ability (HSGCA) are the major grouping methods. This study aimed to (i) assign maize inbred lines into heterotic groups and (ii) compare efficiency of different grouping methods. An experiment with 21 maize inbred lines crossed to two testers with known heterotic groups was conducted in 2017. The hybrid and parent experiments were tested together and laid out side by side. This study identified good heterotic grouping procedure. The breeding efficiency of HSGCA was higher by 31.6, 11.0 and 9.6% over joint SCA and hybrid mean, SCA and hybrid index methods, respectively. While the hybrid index method was more efficient than joint SCA and hybrid mean and SCA by 20.1 and 1.3% respectively, the SCA grouping method was more efficient than joint SCA and hybrid mean method by 18.5%. The highest (37%) and lowest (28.1%) breeding efficiency value were scored by HSGCA and hybrid index heterotic grouping method, respectively. Based on the result, HSGCA grouping method was more efficient. The variable heterotic grouping of the 21 newly developed QPM lines in this study indicated that different heterotic grouping methods have different efficiency in grouping the germplasms.
546			_aText in English
650		7	_aMaize _2AGROVOC _91173
650		7	_aQuality _2AGROVOC _91231
650		7	_aCrossbreeding _2AGROVOC _96302
650		7	_aVarieties _2AGROVOC _91303
700	1		_9791 _aChere, A.T. _8I1705938 _gGlobal Maize Program
700	1		_926606 _aAli, H. M.
700	1		_96746 _aSeyoum, S.
773	0		_dNairobi (Kenya) : Academic Journals, 2021. _gv. 15 no. 8 p. 225-236 _tAfrican Journal of Plant Science _x1996-0824 (Online) _wG94766
856			_yOpen Access through DSpace _uhttps://hdl.handle.net/10883/21963
942			_cJA _n0 _2ddc
999			_c65040 _d65032