Determination of combining ability and heterosis of some cotton crosses | ||||
| Journal of Sustainable Agricultural and Environmental Sciences | ||||
| Volume 4, Issue 3, September 2025, Page 23-31 PDF (714.54 K) | ||||
| Document Type: Original research paper | ||||
| DOI: 10.21608/jsaes.2025.401048.1146 | ||||
 View on SCiNiTO | ||||
| Authors | ||||
Adel Hussein Mabrouk1; Mohab W Elshazly   2; Badeaa Mahmoud3
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| 1Senior Researcher , Cotton Research Institute, Agricultural Research Center, Giza, Egypt | ||||
| 2Researcher , Cotton Research Institute , Agricultural Research center | ||||
| 3Senior Researcher, Cotton Research Institute, Agricultural Research Center | ||||
| Abstract | ||||
| The present study was carried out at Sakha Agricultural Research Station, Cotton Research Institute, Agricultural Research Center, Egypt, during 2023 and 2024 seasons. The results showed highly significant mean squares due to the genotypes, parents, crosses, parents vs. crosses, lines, tester and line x tester for all studied traits, except Micronair reading for the crosses and boll weight for the testers. Three crosses had the best heterosis effect over both mid and better-parent (Giza 88 x 10229, Giza 96 x 10229 and Giza 96 x Suvine) for the most studied traits. The results also revealed that the lines Giza 86 and Giza 96 were significant desirable GCA effects, while the testers Karshenky and Australy 13 had significant desirable GCA effects for most studied traits. On the other side, the cross combinations Giza 88 x 10229, Giza 89 x Karshenky, Giza 89 x Suvin and Giza 86 x C.B.58 were significant desirable SCA effects for some studied traits. Proportion contribution of lines was higher than testers contribution and lines x tester interaction for all traits studied, except uniformity index for testers. Non-additive of genetic parameters was larger than additive genetic variance with respect to all studied traits. The highest broad sense heritability estimates was observed in case of seed index with values of 88.02% and the lowest was for boll weight with value of 57.68%, while for narrow sense heritability, it was ranged from 5.26% to 17.30% for upper half mean and lint cotton yield/plant, respectively. Generally, Giza 96 and Australy13 could be used in breeding programs for improving high yielding varieties, while Giza 96 and Suvine could be considered as excellent parents for breeding programs to produce new varieties characterized with best fiber properties | ||||
| Keywords | ||||
| Cotton; Combining ability; Heterosis; Heritability; Gene action | ||||
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