Genetic Analysis of Important Traits of Rapeseed Under Normal and Salinity Stress Conditions
الموضوعات : Journal of Plant ecophysiology
Ali Akbar Saberi
1
,
Seyed Zabihollah Ravari
2
,
Ahmad Mehrban
3
,
Hamid Reza Ganjali
4
,
Hassan Amiri Oghan
5
1 - aDepartment of Plant Breeding, Zah.C., Islamic Azad University, Zahedan, Iran
2 - Kerman Agricultural and Natural Resources Research and Education Center, Agricultural Research, Education and Extension Organization (AREEO), Kerman, Iran.
3 - Department of Agriculture, Zah.C., Islamic Azad University, Zahedan, Iran
4 - Department of Agriculture, Zah.C., Islamic Azad University, Zahedan, Iran
5 - Seed and Plant Breeding Research Institute, Agricultural Research, Education and Extension Organization (AREEO), Karaj, Iran.
الکلمات المفتاحية: Combining ability, Heterosis, Heritability, Line × Tester ,
ملخص المقالة :
Objective: This study aims to evaluate the heritability of salinity tolerance in canola over three years, identifying potential cultivars and crosses that can enhance yield under salinity stress.
Methods: Text
In the first year, 39 rapeseed lines and cultivars were cultivated under normal and salinity irrigation conditions, and grouped based on their salt tolerance. The second year involved crossing five salinity-tolerant cultivars (lines) with three salinity-sensitive cultivars (testers) utilizing a line × tester crossing method. In the third year, the resulting plant materials were grown again under both irrigation conditions to assess performance.
Results: Text
The results indicated significant average heterosis in crosses compared to their parents under both normal and salinity stress conditions. Notably, under normal conditions, all traits except grain yield and 1000-kernel weight exhibited heterosis, while under salinity stress, all traits except pod length and the number of seeds per pod showed similar results. Lines L5 and L2 were identified as strong general combiners for grain yield under normal conditions, while L5 and T2 excelled under salinity stress. The crosses L5 × T3, L5 × T2, and L4 × T2 demonstrated the highest heterosis for grain yield per plant in both conditions, indicating their potential for breeding programs.
Conclusions:
This research provides valuable insights into the heritability of salinity tolerance in canola, highlighting specific lines and crosses that can be utilized in breeding programs to enhance yield under salinity stress, thereby contributing to sustainable agricultural practices in saline-prone areas.
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