RELATIVE EFFICIENCY OF SOME COTTON GENOTYPES FOR SEED COTTON YIELD AND ITS COMPONENTS UNDER LATE PLANTING | ||||
| Journal of Agricultural Chemistry and Biotechnology | ||||
| Article 1, Volume 5, Issue 5, May 2014, Page 129-146 PDF (773.5 K) | ||||
| Document Type: Original Article | ||||
| DOI: 10.21608/jacb.2014.49888 | ||||
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| Authors | ||||
| A. A. Ali1; Ola A. Galal1; M. E. Abd El-Salam2; F. E. Elfeki2 | ||||
| 1Genetics Dept., Fac. of Agric., Kafrelsheikh Univ., Kafr El-Sheikh, Egypt. | ||||
| 2Cotton Research Institute, Agricultural Research Center, Giza, Egypt. | ||||
| Abstract | ||||
| Sowing date plays an important role in the performance of the Egyptian cotton. So cotton breeders in Egypt pay a great attention to develop new cultivars adapted to late sowing date with a good yield. This study was aimed to select some adapted genotypes for sowing under late planting date which enable the producers to grow some winter crops before cotton planting date. One cycle of pedigree selection for early cotton traits; boll weight, seed cotton yield, lint of seeds per boll and early index was completed in conventional late analysis in two F3 populations of Egyptian cotton. Two experiments were conducted, the first in conventional (May) and the second in late sowing (June) of 80 families from population I and 78 families from population II were planted in both sowing dates (May and June) in Randomized Complete Block Design (RCBD) of three replications in 2013 cotton growing season. As well as F2 single plants from both populations were planted under late sowing date in 2012 cotton growing season. The results of F2 population I showed that the genotypic co-efficient of variation of seed cotton yield per plant was higher in the late sowing date (32.52) than the conventional sowing date of F3 population I (16.29). While, it was lower than that of late sowing date of F3 population I (34.74). The genotypic coefficient of variation of seed cotton yield per plant was higher (33.34) under late sowing date of F2 population II than both conventional and late sowing date of F3 population II (17.30 and 13.99), respectively. Heritability estimates in broad sense were high in both conventional and late sowing date of F3 population I and II (74.85 - 77.84%) and (74.06 - 53.98%), respectively. While, heritability estimates in broad sense were 47.84 and 45.60% in both F2 populations under the late planting date, respectively. Seed cotton yield per plant of population I ranged from 24.78 to 56.79g under conventional sowing date and from 15.29 to 68.55g under the late sowing date. While, it ranged in population II from 33.4 to 59.50g and from 33.20 to 62.25g under conventional and late planting date, respectively. The observed gain in population I for seed cotton yield per plant as percentage from better parent in conventional sowing date ranged from 7.01 to 20.10% and from 28.70 to 66.50% in late sowing date. While, it ranged from 19.60 to 34.30% and from 63.20 to 111.10% in the conventional and the late sowing dates for the commercial variety (Giza86), respectively. The observed gain in population II as percentage from better parent in conventional and late sowing dates ranged from 9.0 to 17.6% and from 42.9 to 51.10%, respectively. While, it ranged from 30.40 to 40.70% and from 81.20 to 91.50% compared with the commercial variety, respectively of the same population. | ||||
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