Pollen sterility

Cytogenetic studies on meiotic chromosome behaviors in sterile Oriental x Trumpet lily

J. R. Luo, Van Tuyl, J. M., Arens, P., and Niu, L. X., Cytogenetic studies on meiotic chromosome behaviors in sterile Oriental x Trumpet lily, vol. 12, pp. 6673-6684, 2013.

In order to determine the reasons for pollen sterility in lily hybrids, four diploid sterile Oriental x Trumpet (OT) lily cultivars ('Nymph', 'Gluhwein', 'Yelloween', and 'Shocking') were used to investigate the meiotic chromosome behaviors in pollen mother cells (PMCs), using genomic in situ hybridization and conventional cytological methods. At metaphase I, chromosome associations were quite variable, not only among different genotypes but also in different PMCs of the same genotype.

Identification of neutral genes at pollen sterility loci Sd and Se of cultivated rice (Oryza sativa) with wild rice (O. rufipogon) origin

B. Liu, Li, J. Q., Liu, X. D., Shahid, M. Q., Shi, L. G., and Lu, Y. G., Identification of neutral genes at pollen sterility loci Sd and Se of cultivated rice (Oryza sativa) with wild rice (O. rufipogon) origin, vol. 10, pp. 3435-3445, 2011.

Pollen sterility is one of the main hindrances against the utilization of strong intersubspecific (indica-japonica) heterosis in rice. We looked for neutral alleles at known pollen sterility loci Sd and Se that could overcome this pollen sterility characteristic. Taichung 65, a typical japonica cultivar, and its near isogenic lines E7 and E8 for pollen sterility loci Sd and Se were employed as tester lines for crossing with 13 accessions of wild rice (O. rufipogon).

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