Genetic variability for morphology, growth and forage yield among perennial diploid and tetraploid lucerne populations (Medicago sativa L)

Julier, Bernadette; Porcheron, A.; Ecalle, C.; Guy, Pierre

doi:10.1051/agro:19950505

Cited by 38 publications

(45 citation statements)

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“…Our results confirm that selecting for improved forage digestibility could be achieved by selecting for higher digestibility of stems, but the interaction between DMY and nutritive value parameters should not be ignored because DMY is one of the critical factors affecting the usefulness of any cultivar. Julier et al (1996) reported a correlation coefficient of -0.44 between enzymatic digestibility of the stems and forage DMY; this is comparable to the present correlation coefficient of -0.66 and -0.50 observed between stem IVDMD and plant DMY for the summer regrowth (Table 6) and the four-harvest means (data not shown), respectively. Stem IVDMD and stem DMY were negatively correlated during the summer regrowth (r = -0.74).…”

Section: Ivdmd and Tn Concentrationssupporting

confidence: 86%

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Leaf and stem dry matter digestibility and ruminal undegradable proteins of alfalfa cultivars

Tremblay¹,

Bélanger²,

McRae³

et al. 2002

Can. J. Plant Sci.

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R. 2002. Leaf and stem dry matter digestibility and ruminal undegradable proteins of alfalfa cultivars. Can. J. Plant Sci. 82: 383-393. Increased dry matter digestibility and ruminal undegradable protein (RUP) concentration are traits highly ranked to improve the nutritive value of forage legumes. Whole-plant, leaf, and stem samples of 27 alfalfa cultivars grown in eastern Canada were analysed for total nitrogen (TN), in vitro RUP, and in vitro dry matter digestibility (IVDMD). The objectives were to determine if significant variation exists among these cultivars, and to establish the relationship between nutritive value parameters of leaves and stems, and those of whole plants. Cultivars were seeded in triplicate on 2 consecutive years and evaluated during the 2 subsequent production years with two harvests per year. There were significant differences among cultivars in IVDMD of stems and plants in spring growth and summer regrowth. Cultivar differences in leaf IVDMD were significant only in spring growth, but this variation was negligible in practical terms. Cultivars with high forage IVDMD also had high stem IVDMD and this relationship was stronger in summer regrowth. Alfalfa plant IVDMD is a function of stem digestibility and the leaf weight ratio (LWR). Cultivar differences were significant for plant TN in spring growth and summer regrowth, and for stem TN in spring growth only. Leaf (270 to 306 g kg -1 TN) and stem (242 to 287 g kg -1 TN) RUP concentrations varied among cultivars in spring growth. Cultivars with high stem RUP also had high leaf RUP concentration but differences in plant RUP were not always attributed to leaf and stem RUP. The RUP concentration was on average 10% higher in leaves than in stems in spring growth, and this difference reached 15% in summer regrowth. The LWR varied among cultivars in spring growth and summer regrowth, and it was positively related to plant RUP in spring growth. Improved whole-plant RUP concentration is unlikely to be achieved by simply selecting for high RUP in leaves or stems; LWR has a principal role in determining alfalfa plant RUP concentration.Key words: Dry matter digestibility, ruminal undegradable proteins, alfalfa, genetic variation, stems, leaves Tremblay, G. F., Bélanger, G., McRae, K. B. et Michaud, R. 2002. Digestibilité de la matière sèche et protéines non dégrad-ables dans le rumen des feuilles et des tiges de cultivars de luzerne. Can. J. Plant Sci. 82: 383-393. Une digestibilité de la matière sèche et une concentration en protéines non dégradables au niveau du rumen (RUP) élevées sont parmi les premiers critères permettant d'améliorer la valeur nutritive des légumineuses fourragères. Les plantes, les feuilles et les tiges de 27 cultivars de luzerne cultivés dans l'est du Canada ont été analysés pour leur concentration en azote total (TN) et en RUP, ainsi que pour la digestibilité in vitro de la matière sèche (IVDMD). Le but était de déterminer s'il existe une variation significative entre les cultivars, et d'établir la relation entre les paramè...

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Section: Ivdmd and Tn Concentrationssupporting

confidence: 86%

“…Differences in stem digestibility among alfalfa populations (Julier et al 1996), cultivars (Mowat et al 1965;Albrecht et al 1987;Buxton et al 1987;Julier and Huyghe 1997), plant introduction accessions , and phenotypes (Volenec and Cherney 1990) have been reported.…”

Section: Ivdmd and Tn Concentrationsmentioning

confidence: 99%

Leaf and stem dry matter digestibility and ruminal undegradable proteins of alfalfa cultivars

Tremblay¹,

Bélanger²,

McRae³

et al. 2002

Can. J. Plant Sci.

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“…According to Camussi et al (1985), Cowen and Frey, (1987), Peeters and Martinelli (1989) PCA can be used to obtain ideas about how to identify groups of accessions that have desirable traits for breeding and enlightening the pattern of variation in a germplasm collection, to identify relationships among accessions and possible gaps. The use of PCA to study variability in germplasm collections of many species have been reported (Julier et al, 1995;Veassy et al, 2001;Naghavi and Jahensouz, 2005;Bharagava et al, 2007;Nooryazdan et al, 2010). It is a method of data reduction where the original variables decreased to a limited number of uncorrelated new variables.…”

Section: Discussionmentioning

confidence: 99%

Morphological Assessment of the Genetic Variability among 53 Accessions of West African okra [<i>Abelmoschus caillei</i> (A. Chev.) Stevels] from South Western Nigeria

Osawaru¹,

Ogwu²,

Dania-Ogbe³

2014

Nig J Bas App Sci

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Genetic variability in fifty three accessions of West African Okra [Abelmoschus caillei (A. Chev.) Stevels] were evaluated using morphological traits. These accessions were collected from home gardens, seed stores and distant farms in South Western Nigeria and trials carried out in the experimental garden, University of Benin, Nigeria. The primary data on quantitative and qualitative characters collected were subjected to multivariate analyses to determine their relationship and distinctiveness. At P < 0.05, 14 quantitative characters were significant. Two principal component analyses were conducted. Eighteen of the total characters accounted for 90.2 % of the total variability on Principal Component (PC) axes 1 -5 and the other, sixteen characters showed 70.1 % as the minimum descriptor for distinguishing A. caillei. The traits expressed by these descriptors are reflected in pigmentation of various organs; fruit characteristics and plant architecture on the crop plants. The sixteen characters suggested for core determination of this species were used for cluster analysis. All accessions clustered into seven distinct groups at Euclidean distance 8 -10. This suggests relatively high genetic variability among the germplasm. The clustering is ecologically independent and the number of accession(s) in each cluster suggests A. caillei as a continuous complex of varieties. This collection requires more evidence probably molecular evaluation for taxonomic treatment of the taxon.

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“…A critical structure for nematode viability is the protective cuticle, an extracellular matrix that forms their exoskeleton. This structure is primarily composed of collagen proteins assembled into higher order complexes [20][21][22][23][24][25]. It appears reasonable to speculate whether saponin interaction with collagen proteins from the cuticle might also be responsible for the observed nematotoxic effects [4,8,11].…”

Section: Data Inmentioning

confidence: 99%

Saponins Suppress Nematode Cholesterol Biosynthesis and Inhibit Root Knot Nematode Development in Tomato Seedlings

AR¹

2014

Nat Prod Chem Res

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Root knot nematodes Meloidogyne incognita are responsible for heavy economic losses to many agricultural crops and considered the most difficult crop pest to control. Recently attention on environmental and food safety in addition to human health has led to increase the limitations on using chemical nematocides and searching for environmental safe natural nematocides. Saponins extracted from Medicago sativa L., alfalfa was used to control the infection of tomato seedlings with root knot nematode Meloidogyne incognita. The results indicated that saponin treatments led to significant reduction in the numbers of larva of root knot nematodes in tomato roots and in soil. The highest nematode inhibition was observed in the treatment of 100% of saponin crude extracts. The observed reduction of the number of nematode larva in tomato roots and in soil were found to be correlated with the decline of cholesterol level in root knot nematode eggs which is due to saponins from Medicago sativa, in a concentration dependent manner. Also saponin treatments showed a general improvement in plant growth and performance.

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Genetic variability for morphology, growth and forage yield among perennial diploid and tetraploid lucerne populations (Medicago sativa L)

Cited by 38 publications

References 1 publication

Leaf and stem dry matter digestibility and ruminal undegradable proteins of alfalfa cultivars

Leaf and stem dry matter digestibility and ruminal undegradable proteins of alfalfa cultivars

Morphological Assessment of the Genetic Variability among 53 Accessions of West African okra [<i>Abelmoschus caillei</i> (A. Chev.) Stevels] from South Western Nigeria

Saponins Suppress Nematode Cholesterol Biosynthesis and Inhibit Root Knot Nematode Development in Tomato Seedlings

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