Pollen Tube Growth After Intergeneric Pollinations of Inhibition of Alien Pollen-Homozygous Sorghum Bicolor

Bartek, M.S. and Hodnett, G.L. and Burson, B.L. and Stelly, D.M. and Rooney, W.L. (2012) Pollen Tube Growth After Intergeneric Pollinations of Inhibition of Alien Pollen-Homozygous Sorghum Bicolor. Crop Science. pp. 1-16.

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Abstract

Hybridization within Sorghum bicolor (L.) Moench has been the primary means of creating genetic diversity for improvement. While considerable variation exists within S. bicolor, traits such as biotic stress tolerance could be improved if secondary and tertiary germplasm pools were accessible through hybridization. Sorghum germplasm possessing the Inhibition of Alien Pollen (iap) allele has enhanced the ability to make successful wide hybridizations between secondary and tertiary gene pools. However the efficacy has not been tested. Pollen from Miscanthus Andersson, Pennisetum L. Rich., Sorghastrum Nash, and Zea L. was transferred to the stigmas of S. bicolor lines Tx3361 (with iap allele) and ATx623 (without iap allele). Pollen of all genera exhibited tube growth, but the frequencies of germination and growth rates varied among species and accessions within a genus. Significantly more pollen germinated and grew into the pistils of Tx3361 than ATx623. Pollen grains were noticably more numerous on stigmas of Tx3361, implying that factors within Tx3361 may also affect pollen adhesion. The results indicate that the potential for intergeneric hybridization of S. bicolor via Tx3361 will vary based on the individual species and accessions within a species that are used as pollinators.

Item Type: Article
Author Affiliation: Texas A&M University, College Station
Subjects: Crop Improvement
Divisions: Sorghum
Depositing User: Mr. SanatKumar Behera
Date Deposited: 18 May 2012 09:11
Last Modified: 18 May 2012 09:11
Official URL: http://dx.doi.org/10.2135/cropsci2011.09.0474
URI: http://eprints.icrisat.ac.in/id/eprint/5482

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