No abstract

-Cytological studies on 4 species belonging to the genera Listera and Neottia of the sub-tribe Neottiinae (Orchidaceae) from the Western Himalaya were undertaken. Two species of Listera (L. longicaulis 2n = 46, L. tenuis 2n = 40) are investigated for the first time. Detailed karyotypic studies were made on two species of Listera and one species of Neottia. Asymmetrical karyotypes are recorded. Meiotic behaviour in the PMC's of Listera longicaulis was very erratic. Clumping of chromosomes at M-I due to stickiness was frequent. There is only a slight difference in the chiasma frequencies of PMC's and EMC's in Neottia listeroides.

SUMMARY -Meiotic and karyological studies on 5 taxa belonging to genera Cephalanthera and Epipactis of sub-tribe Limodorinae (Neottieae) from the Western Himalayas were undertaken. Aneuploid races with 2n = 32 and 34 are recorded in Cephalanthera ensifolia. Detailed karyotypic analysis is made in all the five taxa. Meiotic studies from PMC's as well as from EMC's were studied in Epipactis consimilis and E. latifolia. Chiasma frequency was higher in the embryo-sac mother cells than the pollen mother cells in E. consimilis while reverse was the case in E. latifolia.

No abstract

No abstract