LINE X TESTER ANALYSIS FOR COMBINING ABILITY IN SOME FLAX GENOTYPES | ||||
| Egyptian Journal of Agricultural Research | ||||
| Article 13, Volume 84, Issue 4, December 2006, Page 1133-1146 PDF (3.71 MB) | ||||
| Document Type: Original Article | ||||
| DOI: 10.21608/ejar.2006.233558 | ||||
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| Author | ||||
| HOUSSEN M. H. ABO-KAIED | ||||
| Field Crops Research Institute, Agricultural Research Center, Giza, Egypt | ||||
| Abstract | ||||
| This study was conducted to estimate combining ability and gene action in some flax genotypes. This was achieved via evaluating the twelve parents and their 32 Fi,s progenies. The twelve parents consisting of eight females (P1=Escalina, P2=Leflora, P3=Elona, P4=Marlin, P8=Alba, P6=Verty, P,=117/001 and P8=117/002) and four males (P9=Giza4, P10=5.435/11/10/3, P11= S.402/2/2/5 and P12=5.2467/1). In 2003/04 season, each of the 4 male parents was crossed to the 8 female parents to obtain 32 F1 crosses at the breeding nursery of Fiber Crops Res. Section, ARC at Giza. In 2004/05 season, the parents and their 32 F11 seeds were evaluated at the same location. The collected data regarded herein indicated that for most traits studied, a large portion of gene action was due to non-additive, indicating that the most efficient system for breeding in this case is the bi-parental mating in to obtain new segregates in the segregating generations. GCA variances were not significant for most traits studied. This results may be occurred as a result for using all females in this study belong to one type (fiber type) only of flax. For straw yield, four crosses (pi x Pro. P2 x o r2 - r11, r n 4 X tin and ps x p9) exhibited significant and positive SCA effects for straw yield and most of its components. For seed yield, four crosses (p, x ps, Pi x Pio, pZ x Pa and P7 x PIO) exhibited significant and positive SCA effects for seed yield per plant and in most of its components. It could be concluded that the above mentioned crosses would be interesting and prospective for the future in fax breeding for improving both of straw and seed yield and their components by using bi-parental mating system. The pattern of phenotypic and genotypic correlation of straw, seed yield with other related traits supports the evidence for the possibility of selecting genotypes characterized with high straw yielding ability and in the same time high seed yield potentialities by using bi-parental mating system. | ||||
| Keywords | ||||
| Line x tester; Combining ability; Gene action; correlation; Flax | ||||
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