EVALUATION OF NEW RESTORER LINES FOR HETEROTIC RESPONSE AND COMBINING ABILITY IN SUNFLOWER (HELIANTHUS ANNUUS L.)
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Date
2017-06-29
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Dr. Panjabrao Deshmukh Krishi Vidyapeeth, Akola
Abstract
The present study entitled “Evaluation of new restorer lines for heterotic response and combining ability in sunflower (Helianthus annuus L.)” was under taken to estimate the extent of heterosis and combining ability effects in sunflower genotypes using Line X Tester analysis (Kempthorne, 1957).
The experimental material consist of 14 parents (five CMS lines and nine testers) and their 45 F1’s (crosses) along with standard check DRSH-1 were evaluated in RBD with three replications at the field of Oilseed Research Unit, Dr. Panjabrao Deshmukh Krishi Vidyapeeth, Akola during kharif 2016. The data was recorded on ten characters viz., days to 50% flowering, days to maturity, plant height, head diameter, 100 seed weight, volume weight, seed filling percentage, hull content, oil content and seed yield per plant.
The highest and significant average heterosis and heterobeltiosis for seed yield per plant was recorded by cross combination AKSF-14-1A x P-146R (338.84% & 315.48%) followed AKSF-14-2A x IR-1-1R (291.24% & 254.94%). The highest standard heterosis over best check i.e. DRSH-1 for seed yield per plant was recorded by AKSF-14-1A x EC-601951R (47.21%), followed by cross AKSF-14-2A X IR-1-1R (41.91%) and AKSF-14-2A x AKSF-14R (40.66%). The cross, MS-400A X EC-601951R recorded significant positive standard heterosis over check for seed yield (29.38%) and oil content (4.07%).
Among the parents AKSF-14-2A, EC-601951R and IR-1-1R were found to be best general combiners for most of the yield contributing traits, seed yield and also for oil content, thus these parents should be included in future hybridization programme for improvement in seed yield as well as oil content in sunflower.
The highest significant sca effect for seed yield was recorded by the cross AKSF-14-1A X P-146R (11.03) followed by CMS-2A X R-16 (10.84), AKSF-14-2A X AKSF-14R (10.59) and AKSF-10-1-1A X P-146R (10.45). Three combinations viz., CMS-2A X R-16, AKSF-14-1A X IR-1-1R and MS-400A X EC-601951R recorded highly significant sca effects for oil content as well as for seed yield.
On the basis of mean performance, heterosis and sca effects of crosses, three crosses viz., AKSF-14-1A X EC-601951R, AKSF-14-2A X IR-1-1R and AKSF-14-2A X AKSF-14R are identified as promising crosses for seed yield and the cross MS-400A X EC-601951R is identified as promising cross for seed as well as oil content thus, these crosses needs further evalution in preliminary or multilocation hybrid trials for further commercial exploitation.
Description
The present study entitled “Evaluation of new restorer lines for heterotic response and combining ability in sunflower (Helianthus annuus L.)” a field experiment was conducted to study heterosis and combining ability in sunflower (Helianthus annuus L.) with the objective to identify good general combiners and to estimate the magnitude of heterosis for yield, yield contributing traits and oil content. The crossing programme was conducted during summer 2015-16 and total of 45 hybrids derived from crossing five cytoplasmic male sterile lines with nine diverse testers in a line x tester mating design. These were evaluated during kharif 2016 at research field of Oilseeds Research Unit, Dr. PanjabraoDeshmukhKrishiVidyapeeth Akola, in a randomized block design with three replications. The five cytoplasmic male sterile lines used were CMS-2A, AKSF-14-2A, AKSF-14-1A, AKSF-10-1-1A and MS-400A. The testers were IR-1-1R, EC-601951R, AKSF-14R, 856R, AKSF-12R, P-146R, 272RR, R-16 and BC-3-1R.
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Citation
SAHANE GAJANAN SANDU. (2017). Evaluation of new restorer lines for heterotic response and combining ability in sunflower (Helianthus annuus L.) Department of Agril Botany. Dr. Panjabrao Deshmukh Krishi Vidhyapeeth, M. Sc. 2017, XI, 103p, (Unpublished).