Registration of Alfalfa Germplasm Pools NC‐83‐1 and NC‐83‐2<sup>1</sup> (Reg. No. GP 45 and GP 46)

Kehr, W. R.; Barnes, D. K.; Sorensen, E. L.; Skrdla, W. H.; Hanson, C. H.; Miller, Douglas J.; Thompson, Tommy E.; Carlson, I. T.; Elling, R. J.; Taylor, R.L.; Rumbaugh, M. D.; Bingham, E. T.; Brown, D. E.; Miller, M. K.

doi:10.2135/cropsci1975.0011183x001500040052x

Cited by 6 publications

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“…Trumpetor and WL 316 are private cultivars with moderate levels of resistance to V albo-atrum and NC 83-1 is a broad based germplasm (Kehr et al ., 1975) with a low level of resistance to V albo-atrum. The 14 week inoculation age was planted first and successive inoculation age treatments were planted at successive time intervals so that all plants were inoculated on the same day.…”

Section: Methodsmentioning

confidence: 99%

Influence of plant age, disease incubation time, and host plant resistance on Verticillium wilt symptom expression in lucerne (Medicago sativa)

et al. 1993

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The most economical means to control Verticillium wilt in lucerne, caused by Verticillium albo-atrum, is through resistant cultivars. Most Verticillium wilt resistance evaluations use some form of root-cut-soak inoculation procedure . In Trial 1, three lucerne cultivars were inoculated at eight plant ages and plant symptoms were scored at ten successive weekly intervals . Trial 2 consisted of two cultivars inoculated at ten plant ages and symptoms were evaluated at eight weekly intervals . In an experiment to study the genetics of resistance to this pathogen, four plants showing no visual symptoms were selected from each of four germplasms . The selected populations were crossed in diallel fashion . The population crosses plus the parents were evaluated for resistance to V albo-atrum . Results from Trial 1 and Trial 2 showed disease severity increased with increasing inoculation age and with increasing scoring age . Cultivar symptom expression interacted with inoculation age, but not with scoring age . The diallel analysis supported resistance to Verticillium wilt being conferred by additive gene action, as heterosis was not detected and general combining ability mean square was 3 .75 times larger than the specific combining ability mean square .

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Section: Methodsmentioning

confidence: 99%

Influence of plant age, disease incubation time, and host plant resistance on Verticillium wilt symptom expression in lucerne (Medicago sativa)

et al. 1993

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Genotype by Competition Level Interactions in Alfalfa (Medicago sativa L.)

Asay

Johnson

Rumbaugh

1999

International Journal of Plant Sciences

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Diallel Analysis of Carbon Isotope Discrimination and Its Association with Forage Yield among Nine Historically Recognized Alfalfa Germplasms

2004

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subsp. sativa and nothosubsp. varia (Martyn) Arcang. (Johnson and Tieszen, 1994;Ray et al., 1998). A range Designing effective breeding strategies to integrate selection for of 0.8‰ was detected for ⌬ among 78 winterhardy North carbon isotope discrimination (⌬), as a means to improve alfalfa (Medicago sativa L.) water-use efficiency (WUE), will depend upon American cultivars (Johnson and Rumbaugh, 1995), and the association between ⌬ and forage yield. The current study was a range of 0.9‰ among half-sib families of an elite alfalfa conducted to determine responses in ⌬ affiliated with significant yield breeding population (Ray et al., 1999a(Ray et al., , 1999b. Evidence responses that were previously observed among 36 diallel hybrids of clearly indicates that ⌬ should be amenable to manipulanine alfalfa germplasms (commonly referred to as African, Chilean, tion by traditional alfalfa breeding techniques. Narrow-Flemish, Indian, Ladak, M. falcata, M. varia, Peruvian, and Turkissense heritabilities for ⌬ under both irrigated and watertan). The influence of additive and nonadditive gene action on ⌬, and stressed conditions were 0.56 (Ray et al., 1999a, 1999b), the behavior of ⌬ across harvests was also determined. Forage yield while broad sense heritabilities based on individual plants and ⌬ of the germplasms and their half-diallel hybrids were evaluated exceeded 0.80 in alfalfa (Johnson and Rumbaugh, 1995). near Las Cruces, NM, during May, June, and July in each of 2 yr in Johnson and Rumbaugh (1995) reported significant GCA seeded plots that were flood irrigated every 14 d. Values for ⌬ of hybrids did not significantly exceed those of the most extreme parents effects, but not specific combining ability (SCA), for ⌬ in in any harvest. Variation for ⌬ among crosses was attributed primarily a diallel among 14 clones from the NC-83-1 germplasm to general combining ability (GCA) effects. The magnitude of parental (Kehr et al., 1975). The lack of significance for SCA in per se and GCA effects, and their ability to predict hybrid ⌬ varied that study may reflect the fact that NC-83-1 traced to substantially between the first harvest and later harvests. Variety only winterhardy accessions that were randomly intereffects for ⌬ in Ladak, M. varia, and M. falcata became increasingly mated for two cycles. Opportunities to detect SCA and/ negative as the growing season progressed, while those for African, or heterosis effects for ⌬ may be greater in hybrids de-Chilean, Flemish, Indian, Peruvian, and Turkistan increased. Results rived from distinct populations adapted to a wider range suggest that fundamental differences in stomatal conductance exist of climatic conditions. between subspecies sativa and falcata.

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Registration of Alfalfa Germplasm Pools NC‐83‐1 and NC‐83‐2¹ (Reg. No. GP 45 and GP 46)

Cited by 6 publications

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Influence of plant age, disease incubation time, and host plant resistance on Verticillium wilt symptom expression in lucerne (Medicago sativa)

Influence of plant age, disease incubation time, and host plant resistance on Verticillium wilt symptom expression in lucerne (Medicago sativa)

Genotype by Competition Level Interactions in Alfalfa (Medicago sativa L.)

Diallel Analysis of Carbon Isotope Discrimination and Its Association with Forage Yield among Nine Historically Recognized Alfalfa Germplasms

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Registration of Alfalfa Germplasm Pools NC‐83‐1 and NC‐83‐21 (Reg. No. GP 45 and GP 46)

Cited by 6 publications

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Influence of plant age, disease incubation time, and host plant resistance on Verticillium wilt symptom expression in lucerne (Medicago sativa)

Influence of plant age, disease incubation time, and host plant resistance on Verticillium wilt symptom expression in lucerne (Medicago sativa)

Genotype by Competition Level Interactions in Alfalfa (Medicago sativa L.)

Diallel Analysis of Carbon Isotope Discrimination and Its Association with Forage Yield among Nine Historically Recognized Alfalfa Germplasms

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Product

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Registration of Alfalfa Germplasm Pools NC‐83‐1 and NC‐83‐2¹ (Reg. No. GP 45 and GP 46)