Genetic analysis of morpho-physiological characteristics of sunflower under stress and Non-stress drought conditions

Mehdi Zohdi Aghdam, Farrokh Darvish, Mehdi Ghaffari, Asa Ebrahimi

Abstract


Studying the general and specific combinability of the lines under the favorable and limited irrigational conditions is essential to utilize the parents in creating new hybrid varieties. Furthermore, the type of genetic trends can be effective in determining the suitable corrective methods and in forecasting the rate of genetic development stemmed from the choicemade.To achieve the desired goal five CMS lines and four restorer lines (tester) were crossed in a line × tester scheme in order to analyze general and specific combining abilities and gene effects on sunflower for some agronomic and physiologic traits. Hybrids were evaluated in a randomized complete block design, with three replications under optimum and limited water conditions in the Agriculture Research Station, Khoy, Iran during 2017 and 2018growing seasons. The results of simple analysis of variance in optimum and limited conditions for all traits including 1000 seed weight, %RWC, grain yield, oil yield were significant for all traits. In addition, the results of combined analysis of variance for different traits in optimal conditions showed that the mean square, except for the %RWC traits in the limited conditions for plant height, head diameter, number of seeds per head, 1000 seed weight, proline, catalase enzyme, superoxide dismutase enzyme , Chlorophyll a, chlorophyll b, grain yield and oil yield were significant. results of data variance analysis indicated that the general combinability for lines and tester was significant, as well as the specific combining ability (line×tester) for most traits. Based on the AGK30 and AGK44 combining ability, the RGHK25, RGHK50 and (RGHK50 ×RGHK56) and the (RGHK56 × AGK44) tester were identified as the most suitable line for the hybrid test in both conditions.


Keywords


line; tester; sunflower; General combining ability; specific combining ability

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References


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DOI: https://doi.org/10.5935/PAeT.V12.N2.01