Abstract
Brassica vegetables are important source of dietary nutrition. However, information on the genetic combining ability of mineral elements such as iron, zinc, copper, manganese, potassium and calcium or their types of genetic effects (i.e. additive or non-additive) is scarce but important as it influences the selection of parents and breeding approaches to be adopted for improvement of nutritional quality of cabbage. Therefore, an attempt was made to estimate combining ability in a line × tester (5 × 11) mating design for minerals. Significant mean square for line × tester interaction was observed for all minerals under study indicating the prevalence of non-additive variance; while less than unity value of σ 2gca /σ 2sca ratio for iron, zinc, manganese, potassium and calcium accumulation indicate predominance of non-additive gene action. The parents 83-2, Pride of Asia, Pusa Mukta, Red Cabbage and MR-1 were found good general combiners for four mineral elements. The general combining ability effects of the parents for various minerals revealed that none of the parents excelled for all the minerals suggesting the need for multiple crossing approaches. The cross 83-1 × AC-1019 (Poor × Poor general combiner) exhibits desirable significant specific combining ability effects for all six minerals might be due to presence of high magnitude of non-additive especially complementary epistatic effects which can be utilize for commercial exploitation of heterosis. This study shows clearly that specific combining ability is more important than general combining ability for predicting hybrid combinations for high mineral content in cabbage head.
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Abbreviations
- Fe:
-
Iron
- Zn:
-
Zinc
- Cu:
-
Copper
- Mn:
-
Manganese
- K:
-
Potassium
- Ca:
-
Calcium
- Na:
-
Sodium
- ROS:
-
Reactive oxygen species
- SOD:
-
Superoxide dismutase
- CAT:
-
Catalase
- POX:
-
Peroxidase
- 1O2 :
-
Singlet oxygen
- •O2 − :
-
Superoxide radical
- H2O2 :
-
Hydrogen peroxide
- OH- :
-
Hydroxyl ion
- •OH:
-
Free hydroxyl radical
- GCA:
-
General combining ability
- SCA:
-
Specific combining ability
- σ 2gca :
-
Variance due to GCA
- σ 2sca :
-
Variance due to SCA
- σ 2A :
-
Additive variance
- σ 2D :
-
Dominance variance
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Singh, B.K., Sharma, S.R. & Singh, B. Genetic combining ability for concentration of mineral elements in cabbage head (Brassica oleracea var. capitata L.). Euphytica 184, 265–273 (2012). https://doi.org/10.1007/s10681-011-0598-4
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DOI: https://doi.org/10.1007/s10681-011-0598-4