INHERITANCE OF PROTEIN CONTENT AND SEDIMENTATION VALUE IN DIALLEL CROSSES OF SPRING WHEAT (TRITICUM AESTIVUM)

Abstract

The inheritance of flour protein content and sedimentation value was investigated in diallel crosses among four hard red spring wheat varieties. Variances for the space-planted parental and F2 populations were relatively high. Broad sense heritability values for each trait averaged 55% in the six crosses. Use of purified lines as parents in a 3-selection diallel did not alter the heritability of protein content but the estimates for sedimentation value were substantially improved.Phenotypic correlations in the F2 populations indicated the two quality traits had no consistent relationship, positive or negative depending on the cross. The negative association of protein content with grain yield was significant in nearly all crosses.The diallel cross analysis showed that each quality factor was controlled primarily by intragenic allele systems. Sedimentation value showed partial dominance, with dominant genes contributing to high measurement. Over-dominance in slight magnitude was indicated for protein content, with both dominant and recessive genes contributing to the high expression of this character.

Paternal and Maternal Effects on Protein and Oil Content in Summer Rape

“…No cytoplasmic beans (Porter 1972), sunflowers (Paw-effect on percent protein has been found in lowski 1964), or soybeans (Singh and wheat flour (Hsu 1968) oroats (ohm 1972 (Brown et al. 19'14;Ohm 1972), bur inconsistent with those in soybeans (Sineh and Hadley 1972) and sunflower (Fick 1975 …”

THE GENIC BASIS FOR DIFFERENCES IN SEDIMENTATION VALUE AND PROTEIN CONTENT BETWEEN TWO CULTIVARS OF TRITICUM AESTIVUM

“…Sedimentation values are generally considered to be a function of both protein content and protein quality (Lebsock et a l . , 1964) but Hsu and Sosulski (1969) obtained only low or negative correlations between the two quality traits in two sets of diallel crosses. In the present study it appeared that the three loci which controlled differences in sedimentation value in the Baart >< Ramona crosses conditioned some aspect of protein quality, i.e.…”

“…Several investigators have reported that protein content and sedimentation value are quantitatively inherited and controlled by complex genetic systems, and environmental influences were often as important as genetic factors in the control of wheat quality (Davis et al, 1961 ;Lebsock et al, 1964;Kaul and Sosulski, 1965;Sosulski and Kaul, 1966;Hsu and Sosulski, 1969).…”

Grain Protein Content in Wheat: Genetics of the Character and Some Predictions for Its Improvement in Common Wheat

“…The history of genetic investigation of GPC has completely repeated that of other quantitative characters. Depending on the material examined, the method of trait assessment, and the procedure of treatment of the results, different conclusions were made: the number of genes were estimated as one or many [8], while the heritability coefficient varied in the range from 0.25 to 0.70 [8][9][10][11][12]. In most studies, the character was considered polygenic, although some authors argues that it was controlled by a small number of major genes and several modifier genes.…”

“…In most studies, the character was considered polygenic, although some authors argues that it was controlled by a small number of major genes and several modifier genes. A low grain content is inherited as a dominant or partially dominant character; in some cases, transgressive segregation was reported [9,11,[12][13][14]. It was noted that grain protein content was controlled by regulatory genes rather than by genes coding for storage proteins [15].…”