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REGISTRATION OF GERMPLASM

Registration of FL-NSC Rye Germplasm with Short Culm or Straw Length

^a Agronomy Dep., Box 110500, Univ. of Florida, Gainesville, FL 32611-0500
^b North Florida Res. Educ. Ctr., Quincy, FL 32351-9500

Corresponding author (plp{at}gnv.ifas.ufl.edu)

FL-NSC rye (Secale cereale L.) germplasm (Reg. no. GP-2, PI 613129), which has short culm or straw length, was developed and released by the Florida Agricultural Experiment Station.

This spring, diploid germplasm was derived from a cross between a short culm (mean = 66 cm) population of unknown parentage developed by Dr. Calvin Newton (Pfahler et al, 1985) and a normal long culm (mean = 143 cm) cultivar ‘Florida 401’ (Pfahler et al, 1986; Pfahler and Barnett, 1989). More than 15 cycles of recurrent phenotypic selection, each involving over 1000 space plants, were used in the development of FL-NSC rye. In each cycle, individual plants were selected for short culm length, adaptation to the southeastern USA, spring growth habit, early forage production, and acceptable grain yield with the undesirable plants eliminated before pollination. The culm length of FL-NSC is slightly longer (mean = 73 cm) and more variable than the short culm parent. Short culm length was reported to be partially dominant and controlled by three loci with moderate broad and narrow sense heritability values. FL-NSC possesses many of the characteristics of Florida 401, which were described previously (Pfahler et al, 1986; Pfahler and Barnett, 1989). At its present stage of development, FL-NSC is unacceptable for commercial use in the southeastern USA because of its low forage and grain yield.

Small quantities (50 g) of seed of this germplasm line are available to breeders and geneticists. Written requests should be addressed to the corresponding author. Recipients of the seed are asked to make appropriate recognition of the source of FL-NSC if it is used in the development of a new cultivar, germplasm, parental line or genetic stock.

ACKNOWLEDGMENTS

Appreciation is expressed to Dr. Calvin Newton for supplying the seeds of the short culm parent.

NOTES

Contribution of the Florida Agric. Exp. Stn. as Journal Series no. R-07441. Registration by CSSA.

Accepted for publication September 30, 2000.

REFERENCES

• Pfahler, P.L., R.D. Barnett, and H.H. Luke. 1985. Florida 401 rye: An early forage type adapted to minimum tillage, multiple-cropping systems. Florida Agric. Exp. Stn. Circ. S-315.
• Pfahler, P.L., R.D. Barnett, and H.H. Luke. 1986. Registration of ‘Florida 401’ rye. Crop Sci. 26:836.[Free Full Text]
• Pfahler, P.L., and R.D. Barnett. 1989. Inheritance of culm length in rye. J. Hered. 80:504–506.[Free Full Text]

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