BREEDING BANANAS FOR NEMATODE RESISTANCE

S. ELAIN APSHARA, S. SATHIAMOORTHY, N. CHEZHIYAN

Abstract


India is the largest producer of banana. It is liable to attack by different  pathogens, especially nematodes. Taking into account the yield loss of 40%, caused by  nematodes, a breeding programme was taken up at Horticultural College & Research  Institute, TNAU, Coimbatore to produce hybrids resistant to banana nematodes,  Radoplrolrrs similis, Pmlyienclrus cufleue and Helicolylertcls nurllicirrcltrs. It involved  screening and identification of sources of resistance and hybridization with susceptible  cultivars which otherwise have better horticultural traits. Totally, 3506 crosses were made  using resistant and susceptible cultivars, synthetic hybrids of all ploidy levels and also  with connncrcial diploids. Among the successful crosses obtained seven hybrids H 203  (H 59 x Arnbalakadali), H 205 (H 65 x Pisang Lilin), H 207 (H 89 x Anaikomban), H  213 (H 20l x Ambalakadali), H 230 (H 20] x H H0), H 235 (H 66 x Anaikomban) and  H 237 (H 6 x Ambalakadali) were found to be tolerant to nematodes. The level of  tolerance was assessed from soil and root population of nematodes at different stages of  crop growth and the percentage of lesion on root and corm of the newly developed hybrids.


Keywords


Banana; breeding; Musa; nematodes; resistance

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