PJB-2016-305
BANANA (MUSA. SPP.) STRAIN ‘HD-1’ APPRAISAL
GAO LONGYAN, LI XINGUO*, LI YUANYUAN, WANG LINGXIA, JIANG XUEFEI, ZHOU SHUANGYUN AND ZENG CHUANSHENG
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Abstract
Being one of the important tropical and subtropical fruit trees, banana (Musa.spp.) belongs to the family Musaceae and the order Scitaminae with two genera, Musa and Ensete. In a field survey, research team has discovered a potential banana mutant strain ‘HD-1’ with a sound economic value. The results of the finding are as follows: based on Simmonds’ classification, the pseudostem of banana strain ‘HD-1’ is relatively short and purplish red; its upright outward petiole groove has red edges and wraps its pseudostem loosely. Its ploidy is 3×, AAA type. Karyotype analysis shows that the number of chromosomes is 33, the karyotype formula is 2n=3x=33=2L + 3 M2 + 4 M1 + 2 S, ‘HD-1’ is classified as ‘1B’ type. With the help of ISSR molecular markers, we find thatbanana 'HD-1' has the closest relationship with Pubei and Tianbao dwarf banana; the similarity coefficient is 0.81. In an artificial simulation tests of cold, drought and salt resistance environment changes of physiological and biochemical indexes indicate that ‘HD-1’ exhibits stronger defense capability than Brazil banana. By way of inoculation with injury of root dipping method, we respectively treat two kinds of banana seedlings inoculated Banana Fusarium wilt race 4 small species. The results show that their resistance evaluation scores are 3 and 4, disease levels are ‘susceptible’ and ‘high sensitivity’ respectively. We conclude that ‘HD-1’ has stronger resistance ability toFusarium wilt than Brazil banana.
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