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INHERITANCE OF LINT CHARASTISTISES IN COTTON | ||
| IRAQ JOURNAL OF AGRICULTURE | ||
| Article 1, Volume 2, Issue 16, 2011, Pages 0-0 | ||
| Authors | ||
| L. I. Mohammed; A. A. Al-Marsoomi; S. F. Hassan | ||
| Abstract | ||
| To investigate of inheritance of lint charasteristices in cotton by estimation GCA and SCA effects, and their variances, heterosis in addition to detect some genetic parameters for 81 genotypes (9 varieties and their 72 hybrids). Field experiments were carried out during 2001-2002 at SBAR Agricultural Research Station / Abu-Ghraib. The nine varieties (Marsoomi-4, Ashur-1, Abu Ghraib-5, Cocker-310, Lashata, Kafco-1, Pamir, Rabia-122, Pac-cot- 189) were crossed in all possible combinations including reciprocal, during the season of 2001 using Griffing method 1. The traits for 72 single crosses and 9 parents were measured during 2002 using partially balanced triple lattice design with three replications. Significant differences were found among genotypes (parents, crosses and reciprocal crosses) for all studied traits. The cross (Ashur-1 × Rabia-122) in lint length (32.67 mm),the crosses (Pamir×Rabia-122), (Marsoomi-4 × Kafco-1) in lint fineness (2.40 micronaire) and the cross (Cocker-310 ×Pamir) in lint strength (25.73 gm/Tex). The genetic analysis showed that both additive and non additive gene actions were important in the inheritance of all traits. The effect of GCA were significant for all studied traits, where the parents Cocker-310 and Rabia-122. had highest GCA effect in lint length and fineness and the parents Marsoomi-4 and , Ashur-1 in lint strength. The effects of SCA for crosses were significant for all studied traits, the cross (Ashur-1×Pac- cot- 189) for lint length, the hybrids (Abu Ghraib-5×Cocker-310) and (Ashur-1×Marsoomi-4) for lint fineness and the cross (Marsoomi-4×Rabia-122) for lint strength Average degree of dominance of crosses and reciprocals was greater than 1.00 for all studied characters. Broad- sense heritability were around 0.99-0.94 in crosses and reciprocals. Low values were found for narrow-sense heritability that ranged from 0.31-0.18 in crosses and 0.45-0.27 in reciprocals. This indicated that both additive and non-additive gene effects were responsible for the investigated characters so that can be improve lint characteristics in hybridization fallowed by selection | ||
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