The Geographic Origin of Frost Tolerance in Syrian Pasture Legumes

Cocks, P. S.; Ehrman, T. A. M.

doi:10.2307/2403902

Cited by 50 publications

(26 citation statements)

References 4 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…We see that not only are widely distributed species largely similar in behaviour to those restricted to arid habitats, but that, with the exception of flowering time and, probably, frost tolerance (Cocks & Ehrman 1987), there is only limited ecotypic differentiation. This does not imply that genetic variation is absent.…”

Section: Reproduction Ecological Amplitude and Ecotypic Differentiationmentioning

confidence: 82%

Reproductive patterns in annual legume species on an aridity gradient

Ehrman

Cocks

1996

Vegetatio

Self Cite

View full text Add to dashboard Cite

Reproductive patterns are analysed in annual legumes of west Asia, and their relationships to increasing aridity determined by multivariate analysis. Dormancy, seed size, dispersal and fecundity are shown to be partially substitutable in terms of their effect on survival and population growth.The range of patterns show greatest diversity under mesic conditions in coastal, mediterranean areas with high winter rainfall, low incidence of frost and long growing season. Increasing aridity leads to increasing reproductive homogeneity, in which a subset of patterns -those composed of high levels of seed dormancy, high seed to pod ratios, restricted dispersal capabilities and early flowering -become predominant. These findings corroborate earlier theoretical and empirical evidence concerning desert annuals.The majority of widespread species are shown to possess "arid-type" patterns. This exerts considerable influence on both the type and degree of ecotypic differentiation within species. The only feature that responds consistently to climatic change is flowering time, particularly among species characterized by high seed dormancy. In the few widespread species that do not display "arid-type" characteristics, ecotypic differentiation appears more frequently in a larger suite of traits.The unequal environmental demands made on species showing different levels of dormancy (e.g. variation in length of growing season from year to year and place to place) leads to strong asymmetries governing the relationships between reproduction and ecological amplitude. In this respect "arid-type" strategists with high seed dormancy appear to have greater chances of expansion than others. This has implications when choosing pasture legumes to improve mediterranean grasslands.

show abstract

Section: Reproduction Ecological Amplitude and Ecotypic Differentiationmentioning

confidence: 82%

Reproductive patterns in annual legume species on an aridity gradient

Ehrman

Cocks

1996

Vegetatio

Self Cite

View full text Add to dashboard Cite

show abstract

“…The objectives of this work were therefore twofold: (i) to sample the genetic diversity of annual legumes in Syria with a view to their conservation; (ii) to describe the distribution of species in terms of climate and soil with a view to gaining information which will assist in selecting pasture and forage legumes. The first report of this study, on the geographic origin of frost tolerance, has been described in an earlier paper (Cocks & Ehrman 1987).…”

Section: Introductionmentioning

confidence: 92%

Ecogeography of Annual Legumes in Syria: Distribution Patterns

Ehrman¹,

Cocks²

1990

The Journal of Applied Ecology

Self Cite

View full text Add to dashboard Cite

“…In many legumes, one of the effective factors on seed yield is pod number and commonly there is a linear function between pod number and seed yield. Cocks and Eheman (1987) reported that in all studied annual medics, seed yield was depended to pods number. The M. scutellata and M. minima has the highest 1000 seeds weight while among other species there was no significant differences (Fig.…”

Section: Resultsmentioning

confidence: 93%

Impact of Inter-Row Spacing on Yield and Yield Components of several Annual Medics Species

Bagheri¹,

Sanavy²,

Dolatabadian³

2010

Not Sci Biol

View full text Add to dashboard Cite

A field study was conducted in Faculty of Agriculture, Tarbiat Modares University, Tehran, Iran to evaluate the effects of three within-row spacing treatments (20, 30 and 40 cm) on forage and seed production of five species of annual medics (Medicago scutellata cv. 'Sava'; M. littoralis cv. 'Herald'; M. polymorpha cv. 'Santiago'; M. minima cv. 'Orion' and M. truncatula cv. 'Mogul'). The experiment was carried out in Faculty of Agriculture, Tarbiat Modares University, Tehran, Iran. The results of the experiment indicated that M. polymorpha had the highest forage yield out of the highest plant population. Latter with average 443.09 Kg ha -1 and M. scutellata with average 409.99 Kg ha -1 produced the highest seed yield. Also, the last species with 1306.78 Kg ha -1 had the highest pod yields. The highest seed yield and pod yield were produced at 20 cm within-row spacing because there were not adequate plants for maximum seed and pod yields in 30 and 40 cm within-row spacing. The tested plant densities did not affect on seeds number per pod, 1000 seeds weight and seeds to burr pod weight ratio. The M. truncatula and M. minima have the highest seeds number per pod. In addition, M. scutellata had the highest 1000 seeds weight with an average of 12.57 g. The highest seeds to burr pod ratio was observed in M. polymorpha. The most pod numbers were obtained in 20 and 30 cm within-row spacing and M. polymorpha while, the least pod numbers was observed in M. scutellata. Plant densities did not affect on pod numbers of the mentioned species. The highest dry forage yield was produced in 20 cm within-row spacing. Among the tested tested species, M. truncatula had the highest forage yield with average 870.07 Kg ha -1 . This experiment indicated that there is possibility for seed and forage production of tested annual medics in the mentioned zone with the considering suitable plant densities.

show abstract

The Geographic Origin of Frost Tolerance in Syrian Pasture Legumes

Cited by 50 publications

References 4 publications

Reproductive patterns in annual legume species on an aridity gradient

Reproductive patterns in annual legume species on an aridity gradient

Ecogeography of Annual Legumes in Syria: Distribution Patterns

Impact of Inter-Row Spacing on Yield and Yield Components of several Annual Medics Species

Contact Info

Product

Resources

About