Nitrogen harvest index, Allena satilla, A. sterilis, variation
Forty Avena sativa (L.) lines and 28 A. sterilis (L.) collections were evaluated in two nitrogen environments (i.e., low and high) for variation in nitrogen harvest index (NHI). Significant genetic variation for NHI occurred among entries within both species. NHI varied from 25 to 51%, with a mean of 42% for A. sterilis, and from 42 to 67%, with a mean of 59%, for A. sativa. Mean NHI was significantly lower in A. sterilis than in A. sativa. Some adapted entries with introgressed germplasm from A. sterilis had relatively high NHI's, however. Plant traits that were associated with NHI were harvest index (HI), groat yield (GTY), groat protein yield (GTPY), heading date (HD), and straw protein percentage (SP). High nitrogen fertility caused a significant decrease in NHI and HI, significant increases in groat protein percentage (GTP), straw yield (SY), SP, straw protein yield (SPY), total plant protein yield (TPPY), and vegetative growth rate (GR), and no change in GTY and GTPY for A. sativa entries. High nitrogen increased GTP, SY, SP, SPY, TPPY, and GR and decreased NHI and HI in A. sterilis.
Proceedings of the Iowa Academy of Science
© Copyright 1982 by the Iowa Academy of Science, Inc.
Fawcett, J. A. and Frey, K. J.
"Nitrogen Harvest Index Variation in Avena Sativa and A. Sterilis,"
Proceedings of the Iowa Academy of Science: Vol. 89:
, Article 6.
Available at: http://scholarworks.uni.edu/pias/vol89/iss4/6