Abstract
With 6 figures and 3 tables Abstract The present trial assesses the cytoplasmic effects of Brassica napus (AC) and Brassica carinata (BC) on certain characteristics of Brassica rapa (A), Brassica oleracea (C) and Brassica nigra (B). Alloplasmic lines were developed from AC × A, AC × C, BC × B and BC × C hybrids followed by recurrent backcrossing for seven generations. Twenty-five populations from three generations were compared. The alloplasmic B. oleracea lines with AC-cytoplasm exhibited the shortest filament length, weakly developed anthers, smaller petal size and more than two stigmas, whereas the alloplasmic B. rapa lines with AC-cytoplasm were normal; the alloplasmic B. oleracea lines with BC-cytoplasm formed three groups with short, middle or normal filament length, whereas the alloplasmic B. nigra lines with BC-cytoplasm were normal. From these results, it was concluded that the cytoplasm effect of AC on C is greater than that on A; BC on C is greater than that on B, further suggesting that the cytoplasm effect of AC on C is greater than that of BC on C.
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