Apomictic and sexual reproduction in sorghum

Murty, U.R. and Schertz, K.F. and Bashaw, E.G. (1979) Apomictic and sexual reproduction in sorghum. Indian Journal of Genetics and Plant Breeding, 39 (2). pp. 271-278.

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Embryological comparisons of ‘R 473’, an apomictic line of sorghum, Sorghum bicolor (L.) Moench, and a sexual line were made using ovule squashes. Development of megaspores, megagametophytes, embryos, and endosperms was normal in the sexual line and quite different in ‘R 473’. Apomictic embryo sacs were formed from nucellar cells and apparently sometimes from the mega-spore mother cell. Development in ‘R 473’ was irregular and variable. In ‘R 473’, male nuclei were never observed to fuse with the egg. Endosperm formed after fusion of a polar nucleus and a sperm nucleus, and additional embryo sacs were frequently formed. ‘R 473’ was crossed with its F1’s, F2’s, and BG1’s from crosses with a number of other lines. Progenies contained maternals and hybrids, indicating that ‘R 473’ functioned as a facultative apomict in these crosses

Item Type: Article
Author Affiliation: Regional Research Station, IARI, Hyderabad (A.P.)
Subjects: Crop Improvement > Genetics/Genomics
Crop Improvement > Plant Breeding
Divisions: Sorghum
Depositing User: Ms K Syamalamba
Date Deposited: 12 Dec 2012 08:24
Last Modified: 12 Dec 2012 08:24
Official URL: http://www.indianjournals.com/ijor.aspx?target=ijo...
URI: http://eprints.icrisat.ac.in/id/eprint/9046

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