The importance of parent host status for hybrid susceptibility to herbivores: A test with two hybrid lines of willows

Ecoscience ◽  
2002 ◽  
Vol 9 (3) ◽  
pp. 339-346 ◽  
Author(s):  
Tuija Hjältén ◽  
H. Per Hallgren ◽  
Hao Qian
Keyword(s):  
Host Status ◽  
Hybrid Lines ◽  
Two Hybrid

scholarly journals Screening of carrot lines for quality roots and higher yield for commercial cultivation

2015 ◽  
Vol 2 (1) ◽  
pp. 75-77
Author(s):  
Md Mahfuzur Rahman ◽  
Md Abid Hasan
Keyword(s):  
Research And Development ◽  
Root Length ◽  
Screening Program ◽  
Block Design ◽  
Commercial Cultivation ◽  
Randomized Complete Block Design ◽  
Hybrid Lines ◽  
Two Hybrid ◽  
Standard Weight

The experiment was conducted at Research and Development (R&D) farm of Ispahani Agro LTD., Rangpur in order to screen suitable carrot lines for commercial cultivation in Bangladesh. Two hybrid lines (02001 and 02002) and four open pollinated lines (01001, 01002, 01003 and 01004) were used in this screening program. The experiment was carried out following randomized complete block design with three replications. Results showed that root length and diameter of line 01004 were 14.66 and 3.580 cm, respectively. The standard weight of 5 roots was 519.3 g. Moreover, the line 01004 showed maximum quality roots and yield as compared to any other lines. This line is therefore can be recommended for commercial cultivation in Bangladesh.Res. Agric., Livest. Fish.2(1): 75-77, April 2015

scholarly journals Somatic cell hybrid analyses of hematopoietic differentiation

Blood ◽  
1981 ◽  
Vol 58 (6) ◽  
pp. 1159-1163 ◽  
Author(s):  
HP Koeffler ◽  
RS Sparkes ◽  
R Billing ◽  
G Klein
Keyword(s):  
Somatic Cell ◽  
Lymphoid Cells ◽  
Parental Line ◽  
Phenotypic Differences ◽  
Hematopoietic Lineage ◽  
Epstein Barr ◽  
Hybrid Lines ◽  
Hybrid Clones ◽  
Stimulating Factor ◽  
Two Hybrid

Abstract A differentiated cell expresses an entire set of specialized features. Somatic cell hybridization provides a method to examine control of gene regulation. We studied the expression of tissue-specific features in hybrids between human promyelocytes (HL-60) and human Burkitt's lymphoma cells (P3HR-1). Two hybrid lines, HP-1 and HP-2, and 18 hybrid clones were established and confirmed by karyotype, isozyme, and surface antigen analyses. The hybrids extinguished the 10 myeloid (HL- 60) features that we examined including myeloid morphology, histochemistry, and functions that included response to colony- stimulating factor and ability to differentiate to granulocytes or macrophages. In contrast, the hybrids synthesized immunoglobulin and expressed Epstein-Barr nuclear, early, and viral capsid antigens similar to the P3HR-1 lymphoid parental line. Results are contrasted to the findings when P3HR-1 lymphocytes are fused to human erythroid- myeloid cells (K562). Taken together, our results suggest that phenotypic differences between human myeloid and lymphoid cells in the hematopoietic lineage involve mutually exclusive programs and may possibly be mediated by the activity of diffusible, transacting molecules.

scholarly journals Effects of Maternal Care During Rearing in White Leghorn and Brown Nick Layer Hens on Cognition, Sociality and Fear

Animals ◽  
2019 ◽  
Vol 9 (7) ◽  
pp. 454 ◽  
Author(s):  
Susie E. Hewlett ◽  
Rebecca E. Nordquist
Keyword(s):  
Cognitive Abilities ◽  
Maternal Care ◽  
Social Contact ◽  
White Leghorn ◽  
Behavioral Differences ◽  
Management Processes ◽  
Genetic Strains ◽  
Series Of Experiments ◽  
Hybrid Lines ◽  
Two Hybrid

Both genetic background and maternal care can have a strong influence on cognitive and emotional development. To investigate these effects and their possible interaction, White Leghorn (LH) and Brown Nick (BN) chicks, two hybrid lines of layer hen commonly used commercially, were housed either with or without a mother hen in their first five weeks of life. From three weeks of age, the chicks were tested in a series of experiments to deduce the effects of breed and maternal care on their fear response, foraging and social motivation, and cognitive abilities. The LH were found to explore more and showed more attempts to reinstate social contact than BN. The BN were less active in all tests and less motivated than LH by social contact or by foraging opportunity. No hybrid differences were found in cognitive performance in the holeboard task. In general, the presence of a mother hen had unexpectedly little effect on behavior in both LH and BN chicks. It is hypothesized that hens from commercially used genetic backgrounds may have been inadvertently selected to be less responsive to maternal care than ancestral or non-commercial breeds. The consistent and strong behavioral differences between genetic strains highlights the importance of breed-specific welfare management processes.

scholarly journals Somatic cell hybrid analyses of hematopoietic differentiation

Blood ◽  
1981 ◽  
Vol 58 (6) ◽  
pp. 1159-1163
Author(s):  
HP Koeffler ◽  
RS Sparkes ◽  
R Billing ◽  
G Klein
Keyword(s):  
Somatic Cell ◽  
Lymphoid Cells ◽  
Parental Line ◽  
Phenotypic Differences ◽  
Hematopoietic Lineage ◽  
Epstein Barr ◽  
Hybrid Lines ◽  
Hybrid Clones ◽  
Stimulating Factor ◽  
Two Hybrid

A differentiated cell expresses an entire set of specialized features. Somatic cell hybridization provides a method to examine control of gene regulation. We studied the expression of tissue-specific features in hybrids between human promyelocytes (HL-60) and human Burkitt's lymphoma cells (P3HR-1). Two hybrid lines, HP-1 and HP-2, and 18 hybrid clones were established and confirmed by karyotype, isozyme, and surface antigen analyses. The hybrids extinguished the 10 myeloid (HL- 60) features that we examined including myeloid morphology, histochemistry, and functions that included response to colony- stimulating factor and ability to differentiate to granulocytes or macrophages. In contrast, the hybrids synthesized immunoglobulin and expressed Epstein-Barr nuclear, early, and viral capsid antigens similar to the P3HR-1 lymphoid parental line. Results are contrasted to the findings when P3HR-1 lymphocytes are fused to human erythroid- myeloid cells (K562). Taken together, our results suggest that phenotypic differences between human myeloid and lymphoid cells in the hematopoietic lineage involve mutually exclusive programs and may possibly be mediated by the activity of diffusible, transacting molecules.

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