Stoneville's New Cotton for Beltwide Planting Stoneville X9573

R. G. Ward, C. D. Berry, A. L. Germany, D. M. Panter


In 1994, Stoneville Pedigreed Seed Company will have the experimental strain X9573 available for wide-scale introduction to cotton producers. (The commercial number will be published in early 1994.) Parentage includes the two widely-adapted varieties STONEVILLE 453 and DES 119. Early-generation development occurred at Leland, MS; three-year yield evaluations with cotton producers were performed in 1991-1993 at over 40 sites from North Carolina to California.

In a three-year (1991-93) yield comparison at 41 sites belt-wide, X9573 produced an average lint yield of 1432 lb./acre, which was 114% of STONEVILLE 453 yield (1261 lbs.) and 110% of DES 119 yield (1298 lbs.). In a two-year (1992-93) comparison with Deltapine 5415 at 33 locations belt-wide, X9573 yielded 1374 lbs./acre, 112% of DP 5415 yield (1231 lbs.).

X9573 is similar in maturity to STONEVILLE 453, with a more open fruiting habit (similar to DES 119), and with reduced leaf hair compared to either parent. Lint "turn-out" is 1 to 2 points higher than STONEVILLE 453. Disease resistance is similar to STONEVILLE 453; also, a greater ease of defoliation has been consistently observed.

A 3-year comparison with STONEVILLE 453 for fiber properties (1991-1993, 41 locations belt-wide) has found similar length (1.11 for X9573, 1.11 for STONEVILLE 453), an increase in strength (27 vs. 26), similar micronaire (4.6 vs. 4.4), a slight increase in uniformity ratio (83.3 vs. 82.7), and a slight increase in elongation (7.0 vs. 6.6).

Reprinted from Proceedings of the 1994 Beltwide Cotton Conferences pg. 81
©National Cotton Council, Memphis TN

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Document last modified Sunday, Dec 6 1998