GENETIC STUDIES ON YIELD AND ITS ATTRIBUTES IN SOME FLAX HYBRIDS UNDER DIFFERENT ENVIRONMENTAL CONDITIONS | ||||
| Journal of Plant Production | ||||
| Article 3, Volume 33, Issue 7, July 2008, Page 4697-4715 PDF (847.63 K) | ||||
| Document Type: Original Article | ||||
| DOI: 10.21608/jpp.2008.166788 | ||||
 View on SCiNiTO | ||||
| Authors | ||||
| H. M. H. Abo-Kaied; Amany M. M. El-Refaie | ||||
| Fiber Crops Res. Dept., Field Crops Res. Inst., A.R.C., Giza, Egypt. | ||||
| Abstract | ||||
| The present investigation was conducted using six flax genotypes with their 15 F1 crosses grown under two environments (Giza Exp.Station, Giza Governorate and Ismailia Exp.Station, Ismailia Governorate) to determine combining ability and gene action of some agronomic flax characters in these entries (parents and their crosses). In 2007/08 season, the six parents {P1 (S.541-A/5), P2 (Sakha 3) , P3 (S.435/11/10/3), P4 (Gentiana), P5 (Elona) and P6 (Escalina)} and their 15 progenies were evaluated in a randomized complete block design with three replications at the two above- mentioned locations. High ratio of GCA/SCA revealed that additive played greater role than non-additive genetic effects in the inheritance of straw weight and its two important components (plant height and technical stem length) as well as seed weight and its two important components (No. of capsules per plant and 1000-seed weight) under the two environments and combined analysis. On the other hand, the non-additive genetic effects played an important role in the inheritance of No. of basal branches per plant. Mean squares of interaction between environment and both types of combining ability for most studied traits revealed that the magnitude of both additive and non-additive types of gene action varied from environment to another. Whereas the non-additive genetic effects are more influenced by drought environment than additive effects in each of straw weight, plant height, seed weight and No. of capsules per plant. In contrast, additive genetic effects were more influenced by environment than non-additive effects in both technical stem length and No. of seeds/capsule. The two parents, P1 and P3 showed significant positive gi effects for straw weight, seed weight, No. of capsules per plant and 1000-seed weight in both environments and the combined data. For Sij effects, the two crosses, P1xP4 and P1xP6 for straw weight in addition the two crosses, P1xP5 and P2xP3 for seed weight and 1000-seed weight included low x high general combiner parents. Therefore, these crosses are suitable in breeding program for increasing the previous characters. Concerning drought tolerance, P3 for each of straw weight, seed weight, No. of capsules and 1000-seed weight; P4 for plant height; P5 for technical stem length and P1 for each of plant height, No. of basal branches per plant and 1000-seed weight exhibited high yielding ability with tolerance to drought. Also, the cross, P4xP5 exhibited high yield potential with moderate tolerance to drought for each of straw weight, plant height and technical stem length. While, the cross P1xP5 only exhibited high yielding potential and stress tolerance for all seed characters. In the meantime’s this cross (P1xP5) showed high SCA effects for seed weight and its two important components. Hence the two crosses, P1xP5 and P4xP5 may be useful as potential breeding material for developing genotypes tolerant to sandy soil conditions for seed and straw weight, respectively. | ||||
| Keywords | ||||
| Flax; Diallel analysis; Gene action; Drought tolerance | ||||
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