Genotypic and Phenotypic Variability in Three Prairie Acacia Accessions Academic Article uri icon

abstract

  • This study examined three prairie acacia [Acacia angustissima var. hirta (Mill.) Kuntze var. hirta (Nutt.) B.L. Rob.] accessions from Texas for genetic overlap, adaptation to a wide range of latitudes, as well as seed and herbage yield, nutritive values, and effect of forage harvest on seed production at Stephenville, TX. The southernmost accession (Kingsville prairie acacia; KPA) yielded >400% more (P 0.05) herbage (3483 kg dry matter ha -1 yr -1) at Stephenville, TX, than the other entries the third year after establishment. Herbage removal negatively (P 0.05) affected seed yield, which was as much as 2590 kg ha -1 yr -1 for unharvested Plains germplasm prairie acacia (PPA) the second year after establishment. Final percent plot cover differed (P 0.05) among locations (Knox City, TX, 50%; Stephenville, TX, 100%; Nacogdoches, TX, 99%; Homer, LA, 61%). Differences (P 0.05) in leaf:stem ratios, some nutritive values, and crude protein yields were measured among accessions, with KPA showing the most promise where there were differences. Genetic analysis of inter-simple sequence repeat markers indicated the least within accession difference between two north Texas accessions (91 and 92% similarity) and the most difference between these two and KPA (79% similarity), which also presented a taller, woodier growth habit. Genetic variation within prairie acacia germplasm collected in Texas is expressed primarily in herbage production. Crop Science Society of America.

published proceedings

  • CROP SCIENCE

author list (cited authors)

  • Noah, R. L., Muir, J. P., Brady, J. A., Wittie, R. D., Kattes, D. H., Pitman, W. D., Rea, G. L., & Brakie, M. R.

citation count

  • 2

complete list of authors

  • Noah, Ray L||Muir, James P||Brady, Jeffrey A||Wittie, Roger D||Kattes, David H||Pitman, William D||Rea, Gary L||Brakie, Melinda R

publication date

  • March 2012

publisher