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Biologia Plantarum

, Volume 16, Issue 5, pp 382–388 | Cite as

Aneuploidy in guava

  • Shafaat Mohammed
Article

Abstract

Aneuploids have been identified cytomorphologically in progenies from triploid and diploid-triploid crosses. 30 trisomics, 2 double trisomics, 1 tetrasomic, and 2 higher aneuploids were obtained. Some of the aneuploids were found to be different from those reported earlier and higher aneuploids carried eight extra chromosomes. The plants with one extra chromosome occurred more frequently (67%) than the other aneuploid types.

The changes in morphological traits such as a reduction in the amount of growth and the size of leaf etc. distinguished aneuploids from diploids. In the higher aneuploids the plant parts were highly exaggerated and pollen sterility was very high. The chromosomal counts in acetocarmine squashes confirmed the presence of extra chromosome(s). Aneuploids particularly trisomics were found to be promising and may lead to the production of commercially viable plants.

Keywords

Leaf Size Extra Chromosome Chiasma Frequency Pollen Sterility Psidium Guajava 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

Aneuploidie u gvajavy

Abstract

Cytomorfologickým zjišjováním aneuploidů v potomstvu triploidů a z křížení triploidů a diploidů bylo získáno 30 trisomických rostlin, 2 dvojnásobní trisomici, 2 tetrasomici a 2 vyšší aneuploidi s 8 extrachromosony. Rostliny s jedním extrachromosomem se vyskytovaly častěji (67%) než ostatní aneuploidní typy.

U aneoploidnich rostlin dochází ke změnám morfologických znaků, redukcí růstu a velikostí listů atd. se liší od diploidů. U vyšších aneuploidů s 8 extrachromosomy byly naopak rostliny i listy větší a pylová sterilita byla velmi vysoká. Acetokarmínové roztlaky potvrdily přítomnost extrachromosomů. Aneuploidů—zvláště trisomiků—může být využito k produkci komerčně důležitých rostlin.

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Copyright information

© Institute of Experimental Botany 1974

Authors and Affiliations

  • Shafaat Mohammed
    • 1
  1. 1.Division of Horticulture and Fruit TechnologyIndian Agricultural Research InstituteNew DelhiIndia

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