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Heritabilities of nutritive quality factors and interrelationships with yield in selected progenies of tall fescue (2001)

Santis, G. de ; Chiaravalle, E.

Oxford, UK : Blackwell Publishing Ltd

Plant breeding 120 (2001), S. 0

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ISSN: 1439-0523

Source: Blackwell Publishing Journal Backfiles 1879-2005

Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition

Notes: Nine polycross (PX) and nine different self (S1) progenies were randomly chosen from 43 selected tall fescue genotypes and evaluated for in vitro digestible organic matter (IVDOM), crude protein, neutral detergent fibre, acid detergent fibre and acid detergent lignin of whole plants, leaf blades and stems (stem plus leaf sheath) at each of four harvest dates in 1991 and 1992. Significant variation for all whole-plant and leaf quality traits occurred among the PX progenies at the May harvest. Variation among S1 progenies was significant for almost all of the stem traits. Genetic variance components for both progeny groups were significant for almost all of the traits, confirming the presence of additive genetic variation. Heritability estimates on a progeny-mean basis ranged from medium to high for almost all the traits of the whole-plant and the leaf and stem fractions. The results suggest that spring would be the time at which direct selection for high IVDOM or low fibre content would be successful and that selection for leaf or stem quality traits improves whole-plant quality. Selection for quality traits in the summer or in the autumn would be difficult since no significant genetic variability was found.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1046/j.1439-0523.2001.00617.x

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In vivo behavior of a high performance duplex stainless steel (1993)

Cigada, A. ; Santis, G. De ; Gatti, A. M. ; [et al.]

New York, NY [u.a.] : Wiley-Blackwell

Journal of Applied Biomaterials 4 (1993), S. 39-46

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ISSN: 1045-4861

Keywords: Chemistry ; Polymer and Materials Science

Source: Wiley InterScience Backfile Collection 1832-2000

Topics: Medicine , Technology

Notes: An in vivo investigation of a new high molybdenum and nitrogen duplex stainless steel (25Cr—7Ni—4Mo—0.3N) has been performed. Cylindrical pins and specially developed devices, to test in static conditions the in vivo localized corrosion resistance, made of this new duplex steel and of a common austenitic stainless steel were implanted in rabbit's femurs for 6 and 12 months. After sacrifice, SEM observations and EDS microanalyses to detect metallic ion release were carried out on the femur sections surrounding the pins. Morphologic observations with stereoscope and SEM were performed on the metallic surfaces of the special devices in order to detect the presence of localized corrosion. Both ion release and localized corrosion were observed for the specimens made of austentic stainless steel, but not for those made of 25Cr—7Ni—4Mo—0.3N duplex stainless steel. © 1993 John Wiley & Sons, Inc.

Additional Material: 7 Ill.