000			02125nab a22003137a 4500
001			G69443
003			MX-TxCIM
005			20230530234018.0
008			121211b |||p||p||||||| |z||| |
022			_a0006-341X
022			_a1541-0420
024			_2https://doi.org/10.2307/2528493
040			_aMX-TxCIM
041			_aeng
090			_aREP-1304
100	1		_aEberhart, S. A. _927868
245	1	0	_aTheoretical relations among single three-way, and double cross hybrids
260			_c1964 _aUnited Kingdom : _bInternational Biometric Society,
340			_aPrinted
520			_aThe model presented permits an examination of the means of all possible single, three-way, and double cross hybrids derived from a fixed set of four homozygous lines in terms of additive, dominance, and digenic epistatic effects under the assumptions of normal diploid inheritance, no multiple alleles, no linkage, and no reciprocal effects. Five formulas that have been used to predict double cross performance are examined. The expections of four of these are shown to be identical with the expectation of the double cross in the absence of epistasis. A new method of predicting double cross performance when epistasis must be considered, utilizing both single cross and three-way cross means, is proposed. This method is biased only by a certain portion of the dominance by dominance epistatic effects. The analysis of variance among single, three-way, and double cross means also provides tests for detecting the presence of epistatic effects using non-inbred experimental material. However, since mean comparisons are used in these tests, the failure to detect epistatic effects may be due to the canceling of positive and negative effects as well as to the absence of the effects.
546			_aText in English
595			_aRPC
650		7	_2AGROVOC _926603 _aCross-breeding
650		7	_2AGROVOC _91151 _aHybrids
650		7	_2AGROVOC _91130 _aGenetics
650		0	_gAGROVOC _99142 _aResearch
773	0		_tBiometrics _gv. 20, no. 3, p. 522-539 _dUnited Kingdom : International Biometric Society, 1964 _x0006-341X
942			_cJA _2ddc
999			_c20063 _d20063