Time filter

Source Type

Newbury, United Kingdom

Gul S.,University of Agriculture, Peshawar | Khan N.U.,University of Agriculture, Peshawar | Batool S.,University of Agriculture, Peshawar | Baloch M.J.,Sindh Agriculture University | And 6 more authors.
Journal of Animal and Plant Sciences | Year: 2014

Legacy of seed cotton yield and other quantitative traits is highly persuaded by environmental aspects, therefore, phenotypic response of a genotype is ascertained by genetic and environmental factors upon it, although occurrence of a third effect, of no less importance i.e. genotype-by-environment interaction (GEI). Studies were conducted in 2010 and 2011 evaluating G × E interactions and correlation in upland cotton using randomized complete block design at the University of Agriculture, Peshawar, Pakistan. The GEI was characterized using eight upland cotton cultivars viz., SLH- 284, CIM-446, CIM-473, CIM-496, CIM-499, CIM-506, CIM-544 and CIM-707. Significant (p≤0.01) mean squares for genotypes, environments and G × E interactions revealed genetic variability among cotton genotypes as well as environments inconsistency. The contribution to the total sums of squares, regardless of trait, revealed that genotypes and genotype × environment play principal role followed by environments, while replications (experimental error) share was minimal. The environment accounts for 61.86%, 26.99% and 18.64% of total variation for bolls plant-1, seed cotton yield and sympodia plant-1, respectively, considering the larger effects of environment in combination with genotypes on plant growth and morphology. Seed cotton yield has significant (p≤0.01) positive correlation with boll number, and positive with morphological traits. Based on two-year studies, CIM-496 exhibited the best performance followed by CIM-554 and SLH-284 for improvement in seed cotton and lint yields. Source

Baloch J.-U.-D.,Gomal University | Munir M.,Frontier Agriculture | Abid M.,University of Karachi
Pakistan Journal of Botany | Year: 2013

Seeds of 6 Facultative SDPs (Zinnia cv. Lilliput, Sunflower cv. Elf, French Marigold cv. Orange Gate, African Marigold cv. Crush, Cockscomb cv. Bombay and Cosmos cv. Sonata Pink) were sown into module trays containing homogeneous leaf mould compost. After germination, saplings of each cultivar were shifted into four light intensity chambers (42, 45, 92 and 119μmol.m-2.s-1) for a duration of 8h (from 08:00 to 16:00h) to observe their flowering response. The findings of this study showed that Facultative SDPs raised under low irradiance (42 and 45μmol.m-2.s-1) were more responsive to produce early flowers. However, there was a non-significant difference between 42 and 45μmol.m-2.s-1 and 92 and 119μmol.m-2.s-1 irradiance levels. Although Facultative SDPs under 42μmol.m-2.s-1 flowered few days earlier than those received 45μmol.m-2.s-1 irradiance but the quality of plants (plant height and leaf appearance) was inferior. It is therefore concluded that for better plant quality and early flowering Facultative SDPs should be grown under 45μmol.m-2.s-1 irradiance. Moreover, these plants can be kept under high light intensity (92μmol.m-2.s-1) to prolong juvenile phase for continuous supply in the market. Source

Baloch J.-U.-D.,Gomal University | Munir M.,Frontier Agriculture | Abid M.,University of Karachi
Pakistan Journal of Botany | Year: 2013

To assess photoperiod sensitive/insensitive phases of 3 long day plants (LDPs) viz., Pansy cv. Baby Bingo, Snapdragon cv. Coronette and Petunia cv. Dreams and one short days plant (SDP) viz., Cosmos cv. Sonata Pink a non-linear statistical model was used for its validation. Six plants of each cultivar were transferred from LD to SD and Vice versa at four days interval from emergence until first flower appearance. Plants at juvenile phase (initial phase of development) were insensitive to photoperiod in both inductive (LD for LDPs and SD for SDP) and non-inductive (SD for LDPs and LD for SDP) environment. After completing the juvenile phase when plants were transferred from LD to SD (Pansy, Snapdragon and Petunia) and SD to LD (Cosmos), they showed a coherent recognition of the stimulus carry forward from their respective inductive environment and induced flowering. However, plants transferred from non-inductive environment to inductive showed a continuous phase of photosensitivity. The duration of photoperiod sensitive phases varied with the cultivars. Hence, it is concluded that LDPs and SDP are not sensitive to photoperiod during their entire course of growth and development. Therefore, providing light during whole growing span is mere wastage of energy. These cultivars require 5-10 days of photoperiod at critical phase to flower that will minimize the production cost of cut flower industry. Source

Khakwani A.A.,Gomal University | Khakwani A.A.,University of Reading | Dennett M.D.,University of Reading | Munir M.,Frontier Agriculture | Abid M.,University of Karachi
Pakistan Journal of Botany | Year: 2012

Plants of 6 bread wheat varieties (Damani, Hashim-8, Gomal-8, DN-73, Zam-04 and Dera-98) were subjected to 2 treatments i.e., control treatment (100% field capacity) and stressed treatment (20 days water stress was given during booting stage and 20 days water stress after anthesis). The findings revealed highly significant differences among means of wheat varieties in all physiological and yield traits. Almost all varieties showed their best adaptation under stressed environment however Hashim-8 and Zam-04 behaved exclusively and indicated higher relative water content (RWC), mean productivity (MP), geometric mean productivity (GMP) and stress tolerance index (STI) whereas stress susceptibility index (SSI) and tolerance (TOL) was estimated at its lowest, as these traits are recognised beneficial drought tolerance indicators for selection of a stress tolerant variety. Similarly, total grain yield per plant, biological yield per plant and harvest index was also higher in the same wheat varieties that put them as good candidates for selection criteria in wheat breeding program for drought resistant. Source

Agency: GTR | Branch: BBSRC | Program: | Phase: Research Grant | Award Amount: 225.97K | Year: 2011

This proposal for LINK funded project will build on a solid base of work currently underway, funded through existing LINK programmes, BBSRC, directly by industry, the Scottish Government and the NIAB Trust fund. The proposed study will seek to initiate a better understanding of wheat root growth, morphology and functional relationships with nutrient and water uptake. Methods to describe roots in a diverse range of winter wheat types will be implemented in controlled glasshouse conditions and in the field. The project will form the foundation for improving nutrient sequestration and conversion in this important UK crop through initiation of pre-breeding and development of ideal root ideotypes suitable for use in current and future wheat production. The consortium will concentrate on efficient or enhanced use of resources, especially nitrogen and phosphate and will consider interactions with water availability. In addition, the importance of interactions with beneficial mycorrhizal fungi on nutrient sequestration and the negative impact of soil-borne pathogenic fungi on susceptible genotypes will be considered under field conditions. Finally, the potential impact of agrochemical seed coats on root performance will be assessed. Overall, research in root biology leading to increases in nutrient uptake efficiency will contribute to reductions in diffuse pollution and will substantially reduce green house gas emission due a reduction in the use of nitrogen fertilisers in wheat cultivation

Discover hidden collaborations