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REGISTRATIONS OF PARENTAL LINES

Registration of ND2000 Inbred Line of Maize

Dep. of Plant Sciences, North Dakota State Univ., P.O. Box 5051, Fargo, ND 58105

^* Corresponding author (marcelo.carena{at}ndsu.nodak.edu)

Inbred ND2000 (Reg. no. PL-306, PI 631394) is a yellow-dent maize (Zea mays L.) inbred line developed at the North Dakota Agricultural Experiment Station, North Dakota State University (NDSU), Fargo, ND. ND2000 was released 15 Feb. 2002. It has potential to produce early hybrids with high grain yield, low grain moisture at harvest, high test weight, and very good stalk and root lodging resistance in the northern Corn Belt. ND2000 was derived from a synthetic breeding population, NDSCD(M)C8. NDSCD(M)C8 was developed from NDSCD after eight cycles of stratified mass selection for grain yield and standability at low plant densities. NDSCD is a yellow-endosperm synthetic developed by one cycle of full-sib family selection between NDSC(FS)C1 and NDSD(FS)C1 (Cross, 1984, 1988).

ND2000 [NDSCD(M)C8-3-2-1-1-1-1] was identified after six generations of selfing during pedigree selection and three years of late generation hybrid testing. Testing of ND2000 was performed in 1999 (four locations), 2000 (five locations), and 2001 (five locations) with commercial check hybrids (2 to 5) included in each trial. Average data across environments showed that two and three-way hybrid combinations with ND2000 (8.15 Mg ha^-1) had yields that were statistically (P ≤ 0.05) similar to commercial check hybrids (7.77 Mg ha^-1), and similar root (1.8 vs. 1.5%) and stalk (2 vs. 1.9%) lodging. In addition, ND2000 hybrids showed significantly (P ≤ 0.05) lower grain moisture at harvest and higher test weight than check hybrids. ND2000 in hybrid combination had 10 g kg^-1 greater (P ≤ 0.05) protein concentration and similar (P ≤ 0.05) starch and oil concentration than commercial checks. ND2000 has shown good combining ability with early non-Iowa Stiff Stalk Synthetic (BSSS) unrelated commercial and public testers. Molecular marker analysis putatively places ND2000 in the BSSS heterotic group.

ND2000 is a vigorous line that has above average resistance to early infection by eyespot (caused by Kabatiella zeae Narita and Hiratsuka) and average resistance to early infection by common rust (caused by Puccinia sorgui Schwein.). ND2000 has a medium, green plant color, has a heavy pollen shed, and tends to produce more than one ear per plant. Its plant height is similar to LH176 at Fargo, ND. ND2000 has shown high seed yield (3.1 Mg ha^-1) per se and the highest performance index when compared with 35 elite North Dakota inbreds. Inbred trials have also shown that ND2000 had excellent stalk lodging resistance (0.0%). ND2000 has intermediate husk tightness. Its ears have 14 kernel rows and white cobs. ND2000 silks 2 d earlier than ND286 (NDSU, 1998b, Carena 2002b) and LH176, 3 d earlier than ND285 (NDSU, 1998a, Carena, 2002a) and A641, and 4 d earlier than A619 and MBS1236 at Fargo, ND. ND2000 is a good source for developing early and high-yield maturing inbreds. Maturity classification is AES 200-300.

Breeder seed will be maintained by the North Dakota Agricultural Experiment Station and is distributed on request (50 kernels per request) from the corresponding author, Plant Sciences Department, North Dakota State University, Fargo, ND 58105. U.S. Plant Variety Protection for ND2000 will be requested.

NOTES

Registration by CSSA.

Accepted for publication December 31, 2002.

REFERENCES

• Carena, M.J. 2002a. Corn inbred line ‘ND285’. U.S. Plant Variety Protection 9800128. Date issued: 20 March. 2002.
• Carena, M.J. 2002b. Corn inbred line ‘ND286’. U.S. Plant Variety Protection 9800129. Date issued: 19 March. 2002.
• Cross, H.Z. 1984. Registration of NDSG(MS)C5, NDSC(FS)C1, and NDSD(FS)C1 maize germplasm. Crop Sci. 24:1217.
• Cross, H.Z. 1988. Registration of NDSCD, NDSK(FS)C1, and NDSL(FS)C1 maize germplasms. Crop Sci. 28:201–202.
• North Dakota State University. 1998a. Corn inbred lines-1998 releases [Online], Available at http://www.ag.ndsu.nodak.edu/aginfo/seedstock/varieties/VA-CORN.htm#ND285 (verified 30 January 2003).
• North Dakota State University. 1998b. Corn inbred lines-1998 releases [Online], Available at http://www.ag.ndsu.nodak.edu/aginfo/seedstock/varieties/VA-CORN.htm#ND286 (verified 30 January 2003).

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