Segregations in some diploid bananas



  • Authors : Simmonds, N.W.

  • Document type : Journal article

  • Year of publication : 1953

  • Journal title : Journal of Genetics

  • Volume (number) : 51 (3)


  • Pages : 458-469

  • Peer-reviewed : Yes

  • ISSN : 0022-1333

  • Language(s) : English

  • Abstract : Crosses of diploid seeded Musa acuminata with edible diploid bananas show that parthenocarpy is due to several dominant genes some of which are found in the wild bananas. At least one of these dominants is so far only known from an edible banana and it is believed to have evolved under human selection. Persistence of bracts and flowers on the male axis of the bunch is probably due to complementary genes which can achieve expression only in the presence of the genetical background of parthenocarpy. Persistence and parthenocarpy are associated in inheritance and it is suggested that this is due to pleiotropy, the two characters having a common physiological cause, namely, growth substances. An interracial cross between the Selangor and Tavoy forms of M. acaminata gave evidence of wide genetic difference between the parents. Variation in the F2 was continuous and segregations were not simply interpretable. Much seed-sterility in the F2 was attributed to genetical rather than cytological causes. There was an unexplained association between seed fertility and phenotype. An interspecific cross between the Rhodochlamys species, M. ornata and M. velutina, chosen because of the high fertility and meiotic normality of the F1, gave many vigorous and fertile types in the F2, thus demonstrating the absence of any major reproductive isolation between the two species.

  • Keywords : MUSA ACUMINATA; PARTHENOCARPY; GENETIC INHERITANCE; SEGREGATION

  • Open access : No

  • Document on publisher's site : close View article on publisher's site

  • Musalit document ID : IN170257


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