Chromosome number variation and polyploidy in 19 Kaempferia (Zingiberaceae) taxa from Thailand and one species from Laos

2017 ◽  
Vol 55 (5) ◽  
pp. 466-476 ◽  
Author(s):  
Nattapon Nopporncharoenkul ◽  
Jatuporn Chanmai ◽  
Thaya Jenjittikul ◽  
Kesara Anamthawat-Jónsson ◽  
Puangpaka Soontornchainaksaeng
Keyword(s):  
Chromosome Number ◽  
Number Variation ◽  
Chromosome Number Variation

scholarly journals Genome size stability despite high chromosome number variation in Carex gr. laevigata

2015 ◽  
Vol 102 (2) ◽  
pp. 233-238 ◽  
Author(s):  
Marcial Escudero ◽  
Enrique Maguilla ◽  
João Loureiro ◽  
Mariana Castro ◽  
Sílvia Castro ◽  
...  
Keyword(s):  
Chromosome Number ◽  
Genome Size ◽  
High Chromosome Number ◽  
Size Stability ◽  
Number Variation ◽  
Chromosome Number Variation

scholarly journals Euploid Endosperm of Triploid × Diploid/tetraploid Crosses Results in Aneuploid Embryo Survival in Lilium

HortScience ◽  
2011 ◽  
Vol 46 (4) ◽  
pp. 558-562 ◽  
Author(s):  
Shujun Zhou ◽  
Guixue Zhou ◽  
Kehu Li
Keyword(s):  
Tissue Culture ◽  
Chromosome Number ◽  
Chromosome Preparation ◽  
Male Sterile ◽  
Potential Significance ◽  
Good Source ◽  
Embryo Survival ◽  
Number Variation ◽  
Chromosome Number Variation

The main objective of the present study was to identify chromosome number variation in the progenies from triploid × diploid/tetraploid (3x × 2x/4x) crosses in Lilium to analyze the survival of aneuploid embryos from 3x × 2x/4x crosses and the potential significance of triploid for lily breeding. Two male-sterile autotriploid Asiatic lily cultivars were crossed with four diploid and/or two autotetraploid Asiatic cultivars. The results showed that the fruits of all triploid × diploid/tetraploid (3x × 2x/4x) crosses fully developed, and seedlings were obtained from the 3x × 2x/4x crosses, indicating that male-sterile autotriploid lilies can be used as female parents. Chromosome preparation showed that the progenies of the 3x × 2x/4x are predominantly aneuploid. Based on megasporogenesis, we deduce that the endosperm of 3x × 2x is 7x and that of 3x × 4x is 8x in Lilium and conclude that the aneuploid embryo survival of 3x × 2x/4x in Lilium is the result of the euploid endosperm. Lily is usually propagated by scaling or tissue culture; therefore, aneuploids obtained from triploid × diploid/tetraploid lilies would be a good source for cultivar breeding.

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