Plant Inventory No. 213 - The Germplasm Resources Information ...

PI 636103. Gossypium hirsutum L.Breeding. RN96527. GP-796. Pedigree - Originated as F2 individual plantselection from the cross C21S781-2 / N220-1-91, with a second individualplant selection in the F3. Selections were made in nematode-infestedsoil. The second cycle selection was evaluated as a progeny row in 1996and in replicated tests from 1998 through 2000. Has field tolerance tothe reniform nematode (Rotylenchulus reniformis), is resistant toreproduction and root galling by the southern root-know nematode(Meloidogyne incognita), is resistant to fusarium wilt in the presenceof M. Incognita, and has good productivity and fiber quality. In 1998and 1999, was compared to Stoneville 474 in field evaluations conductedin reniform nematode-infested and fumigated (1,3-dichloropropene) plotsin Weslaco, TX. In 1998, produced significantly greater yields thanStoneville 474 in both the reniform nematode-infested and fumigatedplots. Lint yield reduction caused by reniform nematodes was less than50% of that observed for Stoneville 474. Reniform nematode populationlevel (log reniform nematode population/100 g soil) was significantlylower than for Stoneville 474. Yield reduction due to nematodes was 33%less than Stoneville 474. In 1999, yield in untreated plots was 99% thatof Stoneville 474. In 2000 at Weslaco, TX, RN96527 and Deltapine 50 werecompared in reniform nematode-infested flield plots. Lint yield was 41%higher than Deltapine 50. In environmental growth chamber experimentsrepeated 2 years at College Station, TX, the root-knot nematode rootgall index averaged 2.4 compared to 3.8 for the standard susceptiblecheck, Deltapine 16; in 1998, 15% as many root-knot nematode eggs wereproduced as on Deltapine 16. In Fusuarium Wilt Root Knot NematodeEvaulations at Bossier City, LA, during 1998 and 1999, root-knotnematode gall ratings averaged 2.0 compared to 3.6 for Stoneville 474,while the average fusarium wilt rating was 1.9 compared to 3.6 forStoneville 474. At the Regional Cotton Fusarium Wilt Nursery, Tallassee,AL, during 1999 and 2002, average wilt incidence was 11% compared to 44%for Rowden, the susceptible check, and 2% for M-315, the resistantcheck. Compared to Stoneville 474, lint percentage was 4% lower,micronaire value was 0.9 units lower and fiber was 10% stronger.PI 636104. Gossypium hirsutum L.Breeding. RN96625-1. GP-797. Pedigree - Originated as a F2 indivdualplant selection from the cross C21S781-2 / N222-1-91, followed byindividual plant selections in the F3 and F4. Selections were made inreniform nematode-infested soil. The second cycle selection wasevaluated as a progeny row in 1997 and in replicated tests from 1998through 2000. Has field tolerance to the reniform nematode(Rotylenchulus Reniformis), is resistant to reproduction and rootgalling by the southern root-knot nematode (Meloidogyne incognita), isresistant to fusarium wilt in the presence of M. incognita, and has goodproductivity and fiber quality. In 1998 and 1999, was compared toStoneville 474 in field evaluations conducted in reniformnematode-infested and fumigated (1,3-dichloropropene) plots at Weslaco,TX. In 1998 produced significantly greater yields than Stoneville 474 inboth the reniform nematode-infested and fumigated plots. Lint yieldreduction caused by reniform nematodes was less than 50% of thatobserved for Stoneville 474. Reniform nematode population level (logreniform nematode population/100 g soil) was significantly lower thanfor Stoneville474. Yield reduction due to nematodes was less than 50%than suffered by Stoneville 474.In 1999, yield in untreated plots was10% higher than Stoneville 474. In 2000 at Weslaco, TX, RN96625-1 andDeltapine 50 were compared in reniform nematode-infested field plots.241