Thomas McNeilly

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Salt (NaCl) tolerance of three amphidiploid Brassica species, B. napus (AC genome), B. carinata (BC genome), and B. juncea (AB genome), and their putative diploid relatives, B. campestris (A genome), B. oleracea (C genome) and B. nigra (B genome) was examined under glasshouse conditions. The plants were grown in sand culture throughout the study period (51(More)
Zinc tolerance, based on root growth in zinc-containing solutions, was examined in samples of 30 Agrostis capillaris L. individuals collected from populations beneath five electricity pylons in North Wales. The populations were found to vary in zinc tolerance. Three of them contained individuals whose tolerance ranged from low to high, one population(More)
Cistus salvifolius L. is a widespread Mediterranean shrub, occurring over a wide range of environments. Given the degree of habitat differentiation, and geographic isolation of some populations, adaptation to local conditions and hence population divergence might be expected to have occurred. To test this hypothesis morphology and allozyme diversity was(More)
The effects of increased salinity [NaCl + CaCl2] on seedlings of five accessions of pearl millet grown for 2 and 7 weeks, respectively, in salinised solution cultures at EC 0.6, 4, 8, 12, 16, and 20 ds m−1 and sand cultures at EC 0.6 and 20 were assessed. There were no consistent relationships between seedlings characters at two and seven weeks in response(More)
THE importance of isolation in promoting population divergence and speciation has long been recognised (e.g. Mayr, 1942; Dobzhansky, 1941; Baker, 1959). Isolation was considered a prerequisite for population divergence until Thoday (1958) showed that disruptive selection could effect such divergence in the absence of isolation. Recently the occurrence of(More)
Influence of supra-optimal concentrations of K on growth, water relations, and photosynthetic capacity in pearl millet under severe water deficit conditions was assessed in a glasshouse. Nineteen-days-old plants of two lines, ICMV-94133 and WCA-78, of Pennisetum glaucum (L.) R.Br. were subjected for 30 d to 235.0, 352.5, and 470.0 mg(K) kg−1(soil) and two(More)
Additive genetic variances and covariances were estimated for life history and morphological traits in two adjacent populations of the grass, Holcus lanatus L. Significant phenotypic differentiation was found between the two populations for four of the 15 morphological attributes measured. Significant differences in genetic architecture were found between(More)
The genetic basis of salt tolerance was examined in selected salt tolerant and sensitive material from a sample of accessions previously assessed for variability in salinity tolerance. The North Carolina Model 2 Design and analysis was followed, tolerance being assessed in 10-day-old seedlings grown in salinized solution culture at control (0 mM), 60 mM and(More)
The genetic basis of plant height at various growth stages and the degree of indetermination of plant height in six mungbean genotypes (NM 92, 6601, NM 89, VC 1560D and VC 3902A) were assessed through half diallel cross. Cultivars, 6601 and NM 92, were the best general combiner for pre-flowering dry matter accumulation and minimum increase in plant height(More)