[The effect of the morpho-physiological factors on the yield of rice breeding varieties: Theoretical consideration on the change of yield components and its contribution share in processing of rice varieties' breeding]
1992
Kim Se Chang (Inst. for Rice, Pyongyang (Korea Democratic People's Republic))
The highlights of yield components in breeding for high yielding varieties are number of grains per spikelet and 1000 grain weight. The yield components of newly breeding varieties are as follows: 44.05% for number of grains per spikelet, 33.41% for number of spikelet, 19.13% for 1000 grain weight and 3.41% for ripening rations in order of number of grains per spikelet number of spikelets 1000 grain weight ripening ratio
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