Heterosis Performance of Seed Cotton Yield and Physiological Parameters in F1 Inter Specific Hybrids in Cotton
Agricultural Research Station, Dharwad Farm, University of Agricultural Sciences, Dharwad, Karnataka, India 580005
Cotton Genomics and Genetics, 2013, Vol. 4, No. 5 doi: 10.5376/cgg.2013.04.0005
Received: 26 Jul., 2013 Accepted: 31 Jul., 2013 Published: 20 Nov., 2013
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Preferred citation for this article:
Yanal Alkuddsi et al., 2013, Heterosis Performance of Seed Cotton Yield and Physiological Parameters in F1 Inter Specific Hybrids in Cotton, Cotton Genomics and Genetics,Vol.4, No.5 60-72 (doi: 10.5376/cgg.2013.04.0005)
In order to known better the heterosis performance, yield and physiological parameters in 112 hybrids (F1) and their parents the study initiated to create recombinational variability for combining ability, the elite barbadense lines DB 533 and DB 534 were crossed during 2007~2008. During two seasons 2008~2009 and 2009~2010 these barbadense crosses were advanced to F2 and F3 generations, respectively. The F3 lines were evaluated for productivity and fiber quality parameters realizing the emphasis laid on developing ELS (Extra Long Stable) cotton hybrids out of 171 F3 lines, only those F3 lines with acceptable fiber strength were utilized in the study on recombinational variability of combining ability. During 2010~2011 those twenty eight F4 lines of barbadense cross DB 533 × DB 534 depending on the higher value of fiber tenacity, were crossed with the selected four hirsutum testers viz., DH 98-27 (T1), ZCH 8 (T2), 178-24 (T3) and DH 18-31 (T4) selected based on earlier study. The derived F1 crosses (28 barbadense lines x 4 hirsutum testers) were compared with the bench mark crosses (two barbadense lines x 4 hirsutum testers) of the heterotic box, best Bt check hybrid (MRC 6918) and non Bt check (DCH 32). Many derived F1 crosses were found to be more productive than non Bt check DCH 32 (48 hybrids) and the Bt check MRC 6918 (35 hybrids). The potential crosses like DH 98-27 X (DB 533 x DB 534 F4 IPS 49), DH 98-27 X (DB 534 x DB 533 F4 IPS 22) and DH 98-27 X (DB 533 x DB 534 F4 IPS 52) recorded highest per se performance for seed cotton yield. These potential crosses recorded highly significant heterosis over mid parent for seed cotton yield. They also recorded significant heterosis for other physiological parameters. Apart from showing high productivity the potential cross DH 98-27 X (DB 533 x DB 534 F4 IPS 49 showed higher value of photosynthetic rate and stomatal conductance. This potential cross is example for blending of yield characters and physiological parameters.
Heterosis; Per se performance; Seed cotton yield; Physiological parameters
Cotton Genomics and Genetics
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