Heterosis studies for yield and fiber quality traits in intra hirsutum hybrids of cotton (<italic>Gossypium hirsutum</italic> L.)

Abstract

The present study was performed to evaluate the heterosis effects for seed cotton yield and fiber quality traits of 56 hybrids and their parents involving seven lines and eight testers along with a check at Acharya N.G. Ranga Agricultural University, Hyderabad. The results showed that, range of relative heterosis varied from -3.40 to 13.29 in ginning percentage, -5.28 to 14.10 in 2.5% span length, -8.72 to 8.25 in uniformity ratio, -16.39 to 14.88 in micronaire value, -5.97 to 10.02 in bundle strength and -32.57 to 113.40 in seed cotton yield per plant, where, highest number of crosses (24) with significant mid parental heterosis in desirable direction was observed for seed cotton yield per plant followed by 2.5 % span length (16) and ginning percentage (12). Desirable and significant heterosis over better parent was observed in the crosses for all the studied characters except for uniformity ratio. A good number of crosses recorded significant standard heterosis over check for all the studied parameters except for uniformity ration and micronaire value. Apart from showing considerable level of heterosis for seed cotton yield, the crosses AKH 9331 x HAG 1055 exhibited good level of heterosis for ginning percentage, Galama x L 604 and Galama x JK 344 for uniformity ratio, Galama x HAG 1055, AKH 9331 x HAG 1055 and CPD 420 x IC 356932 for 2.5% span length and CPD 420 x JK 344 and BC 68-2 x LK 861 for bundle strength. So these crosses could be exploited to improve the yield along with one or more fiber quality traits through heterosis breeding.

Heterosis studies for yield and fibre quality traits in American cotton (Gossypium hirsutum L.)

“…The best heterotic combinations identified were HYPS-152 × GSHV-177, L1493 × SCS-1207 and L1493 × GTHV-13/32 over mid parent, better parent and standard check for bundle strength. These results are in conformity with the reports of Sekhar et al (2012), Kumar et al (2013) and Srinivas and Bhadru (2015).…”

“…The hybrid combinations, viz., HYPS-152 × SCS-1207,(L770 × GSHV-177, SCS-1207 × PBH-13, SCS-1207 × GJHV-497, SCS-1207 × GSHV-177, SCS-1207 × GTHV 13/32, PBH-13 × GJHV-497, PBH-13 × L1231, GSHV-177 × GTHV-13/32 and GSHV-177 × L1231 exhibited a significant positive heterosis over mid parent, better parent and standard check. These results are in agreement with the findings of Balu et al (2012), Sekhar et al (2012), Maria et al(2012, Patel et al(2012), Kumar et al(2013), Nassar (2013, Srinivas and Bhadru (2015), Abdul et al(2016) and Jayshankar (2017) who had reported a significant positive heterosis for seed cotton yield plant -1 .…”

“…The mean values of heterosis for 2.5 % span length over mid parent, better parent and standard check were found to be 4. Sekhar et al(2012), Kumar et al (2013), Srinivas and Bhadru (2015) and Jayshankar (2017). The crosses viz., L788 × L1493, L770 × PBH-13, L770 × GSHV-177, L1493 × SCS-1207, L1493 × GJHV-497, L1493 × GSHV-177, L1493 × GTHV-13/32, PBH-13 × GJHV-497, PBH-13 × GSHV-177, PBH-13 × L1231 and GJHV-497 × L1231 exhibited a significant positive heterosis over mid parent and better parent and standard check.…”

Studies on heterosis for yield and yield attributing traits in American cotton (<em>Gossypium hirsutum</em> L.)

“…The crosses viz., SCS-1207 × L1231, L1493 × GTHV-13/32 and GSHV-177 × L1231 were identified as the best heterotic combinations over mid parent, better parent and standard check for ginning outturn. These results are in accordance with the findings of Sekhar et al (2012) [12] , Kumar et al (2013) [6] , Srinivas and Bhadru (2015) [13] and Abdul et al (2016) [2] . In the present study based on per se performance and significant standard heterosis the crosses, SCS-1207 × GSHV-177, GSHV-177 × L1231 and SCS-1207 × PBH-13 were found to be promising for seed cotton yield plant -1 .…”

Study of Heterosis, Combining Ability and Parental Diversity for Seed Cotton Yield and Contributing Traits using Diallel Data in Cotton (G. hirsutum L.)

“…Average heterosis was found positive for all the traits in both straight and reciprocal cross combinations except for number of sympods for which mean for reciprocal effects was found to be negative. Several workers have reported similar type of results for economic traits in cotton (Choudhary et al 2014, Srinivas and Bhadru 2015.…”