| publication name | GENETIC STUDIES OF SOME QUANTITATIVE CHARACTERS IN SOYBEAN (GLYCINE MAX (L) MERRIL) . |
|---|---|
| Authors | A. A. El-Hosary; , M. Bastawisy Habeeb and , A. I.Fahmi |
| year | 1997 |
| keywords | |
| journal | |
| volume | Not Available |
| issue | Not Available |
| pages | Not Available |
| publisher | Not Available |
| Local/International | Local |
| Paper Link | Not Available |
| Full paper | download |
| Supplementary materials | Not Available |
Abstract
Two cros.ses of soybean (CallandX ،Jardin) and (Elgin X Hardin), each withsix populations (P1, P2, Fi, F2. BC) and BC2) were testedfor earliness, yield ànd ils components. Signijicant positive heterolic effects were detected for all traits except number of days to maturity which gave significant negative heterotic effect in both crosses. Overdominance towards the higher parent was obtained for number of branches per plant, first pod height and 100-seed weight in the first cross, number ofpods per plant, number of seeds per plant and seed yield per plant in both crosses. Absence of dominance was detected for number of days to inflorescence in the second cross. Partial dominance, towards the higher parent was detected for other traits. Signijicant positive values of inbreeding depression (7. D.) were detected for number of branches per plant, plant height, number ٍf seeds per plant, number of pods per plant and seed yield per plant in both crosses and first pod heLghl and ، 00-seed weight in the second and first crosses, respectively. Jnsign ،Ji cant I. D. value was obtainedfor number of days to inflorescence in the first cross. While, the other cases رave sign ijicant I. D. values. The additive gene effects were signijicant for all traits. Also, significant dominance values were obtained , f or all traits except number of branches in the first crosses. Signijicant estimates for one or more of the three types of epistasis in both crosses were detected for all traits. High heritability values in broad sense were obtained in both crosses for all traits except maturity period, number of seeds per pod, seed yield per plant in the second cross and 100-seed weight in the first cross which had a moderate heritability values. Moderate heritability values in narrow sense were obtained for most traits. The predicted genetic advance (expressed as a percentage of the mean) was rather moderate for all cases except maturity date and maturity period in both cross. Meanwhile, flowering date and 100-seed weight in the first cross showed low genetic gain.