Forage Production and Quality of Synthetics Derived from Lolium ✕ Festuca Hybrids1
- Clyde C. Berg,
- R. R. Hill,
- R. C. Buckner and
- R. F. Barnes2
Nine experimental four-parent synthetics from derivatives of Lolium ✕ Festuca hybrids and five cultivars of tall rescue (Festuca arundinacea Schreb.) were evaluated for spring growth, maturity, dry matter yield, in vitro dry matter disappearance (IVDMD), and other characters. Three synthetics were from parents that had been selected for yield and vigor in a topcross progeny test; four were from parents that were palatable in an animal acceptance trial; two were from parents that were unpalatable in an animal acceptance trial. Our objectives were to determine the effects of parental selection methods on performance of the synthetics and to compare the performance of the synthetics with that of tall rescue cultivars.
Synthetics from topcross-selected parents had greater vigor and forage yields and matured earlier than those from palatable or unpalatable parents. IVDMD of the synthetics from topcross-selected parents was not significantly different from the average IVDMD of synthetics from palatable and unpalatable parents. The synthetics from palatable parents had significantly greater IVDMD means than those from unl~alatable parents
The synthetics were less vigorous, matured earlier, had less first-harvest, third-harvest, and total season yield, and had a lower IVDMD mean than the tall rescue cultivars. Average second-harvest yield of the synthetics significantly exceeded that of the tall rescue cultivars. Variability among the synthetics suggested that breeding could correct most of these deficiencies.Please view the pdf by using the Full Text (PDF) link under 'View' to the left.
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