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Genetic Analysis on Main Traits of the Hybrid of Colored Upland Cotton(G.hirsutum) and Sea-island Cotton(G.barbadense)

WANG Qiao-ling,LI Zhe(Henan Institute of Science and Technology,Xinxiang 453003,China)  
Genetic mechanism of characters of morphology,yield and quality of the hybrid of colored G.hirsutum L.H44 and G.barbadense L.Xinhai 1 were analyzed using a backcross typical analysis method.The results showed that the heterosis and average dominance was obvious for those traits of F1,which were plant height,fruit branches per plant,fruit nodes per plant,the 1st fruit node's length of 1st fruit branch and bolls per plant.Boll weight,lint percentage and fiber length have higher broad and narrow heritability,and should be selected in the earlier generations.However,bolls per plant,theoretic yield per plant and fiber regularity had higher broad heritability and lower narrow heritability,and should be selected in the later generations.The minimum number of genes of boll weight,lint percentage and fiber length had higher K values,which posed great difficulty to the use of hybrid of G.hirsutum L.colored and G.barbadense L..The minimum number of genes of bolls per plant had lower K values,and recombination types would easily appear in the hybrid generations.
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