|
|
GENETICAL ANALYSIS FOR SEED YIELD AND
ITS COMPONENTS IN CANOLA
|
|
|
Abstract: Generation mean analysis was performed using two canola crosses (Serw 4x1056), and (Bactol 1x1055) to have insight into the genetic control of some quality traits using six populations (P1, P2, F1, F2, BC1 and BC2. Results revealed that epistatic gene effect cannot be ignored when establishing a new breeding program to improve canola populations for economic traits. The inheritance of all traits studied was controlled by additive and non-additive genetic effects, with greater values of dominance gene effect than the additive one in most cases. Heterosis relative to mid-parent and better parent was found to be significantly positive for number of racemes/plant and number of siliquae/ raceme in the two crosses under study, and plant height in cross I. While, it was negative for plant height in cross 2, number of days to 50% flowering, 1000-seed weight and seed yield per plant in the two crosses. The coincidence of sign and magnitude of heterosis and inbreeding depression was detected for most traits in the two crosses. The average degree of dominance as indicated by (H/D) revealed existence of over-dominance towards the better parent for all traits except for number of days to 50 % flowering and seed yield per plant in cross I. Heritability, in narrow sense, estimates were generally found to be moderate in magnitude in all cases. The highest estimates of narrow sense heritability were associated with the highest genetic advance for seed yield per plant and were found in cross II. This indicated that sufficient improvement could be achieved for this trait according the present genetic analysis.
|
| Publication year |
2017
|
| Organization Name |
|
| serial title |
المجلة المصرية لتربية النبات
|
| Author(s) from ARC |
|
| External authors (outside ARC) |
|
| Publication Type |
Journal
|