EL-SHIMY, G., EL-REFAIE, A., ZAHANA, A. (2008). HETEROSIS, INBREEDING DEPRESSION AND CORRELATIONS OF YIELD TRAITS IN SOME FLAX CROSSES. Egyptian Journal of Agricultural Research, 86(3), 943-956. doi: 10.21608/ejar.2008.209026
GAMAL ELDIN H. EL-SHIMY; AMANY M. M. EL-REFAIE; AFAF E. A. ZAHANA. "HETEROSIS, INBREEDING DEPRESSION AND CORRELATIONS OF YIELD TRAITS IN SOME FLAX CROSSES". Egyptian Journal of Agricultural Research, 86, 3, 2008, 943-956. doi: 10.21608/ejar.2008.209026
EL-SHIMY, G., EL-REFAIE, A., ZAHANA, A. (2008). 'HETEROSIS, INBREEDING DEPRESSION AND CORRELATIONS OF YIELD TRAITS IN SOME FLAX CROSSES', Egyptian Journal of Agricultural Research, 86(3), pp. 943-956. doi: 10.21608/ejar.2008.209026
EL-SHIMY, G., EL-REFAIE, A., ZAHANA, A. HETEROSIS, INBREEDING DEPRESSION AND CORRELATIONS OF YIELD TRAITS IN SOME FLAX CROSSES. Egyptian Journal of Agricultural Research, 2008; 86(3): 943-956. doi: 10.21608/ejar.2008.209026
HETEROSIS, INBREEDING DEPRESSION AND CORRELATIONS OF YIELD TRAITS IN SOME FLAX CROSSES
Fiber Crops Research Department, Field Crops Research Institute, Agricultural Research Center, Giza, Egypt
Abstract
The present investigation was carried out at Giza Agric. Res. Farm, Agric. Res. Center (A.R.C.) during 2003/04, 2004/05 and 2005/06 seasons. The main objective was to evaluate five parental genotypes {Giza 4 (P1), Belinka (P2), 5.2465/1 (P3), 5.533/39 (P4) and Sakha 1 (Fs)), in addition to four possible crosses (P1xP3, P1xP4, PixPs and P2x135) in the F1 and F2 generations for yield, heterosis, inbreeding depression, genetic parameters, phenotypic (r1,) and genotypic (r9) correlations. Results showed that the cross F2 (F2xFs) was superior to other entries in plant height and technical stem length but it ranked second for fiber percentage. The cross F2 (PixFs) recorded the highest straw and fiber yields/plant, while the strain 2465/1 ranked first in seed yield / plant followed by F2 (P1xF3) and F1 (PorP3).The majority of studied crosses showed positive heterosis values over mid-parents, but few ones over the better parent for straw and seed traits. The cross P1xP3 performed inbreeding gain in most seed characters, while the two crosses PixPs and PzxPs exhibited inbreeding advancement in F2 generation for six straw traits and five seed characters. The estimates of rp < /sub> coefficient were significant and positive between plant height and each of technical stem length, fiber yield/plant and fiber percentage with rg positive values. The estimates of rp < /sub> coefficient between no. of capsules/plant and each of no. of seeds/plant, seed index and seed yield/plant recorded significant positive correlation with r9 values.
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