Agricultural Sciences

Alley Farming (The Tropical Agriculturalist) by B.T. Kang, A.N. Atta-Krah, L. Reynolds

By B.T. Kang, A.N. Atta-Krah, L. Reynolds

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Latipes and D. labrax (Piferrer and Blazquez, 2005). In O. , 2001a,b). , 2002). In fishes, p450 11β is involved in the production of 11-oxygenated androgens, 34 Genetic Sex Differentiation in Fish especially 11-KT, the potent androgen of males. The p450 11β cDNA has been cloned in A. , 1996), O. , 2000) and D. , 2007). , 2005b). , 2009). (vii) foxl2 is a forkhead box transcription factor (Hannenhalli and Kaestner, 2009) and is a female specific gene known to induce the earliest dimorphic sexual differentiation.

2002) Micropogonias undulatus Unusual binding properties of erβ are accompanied by highly conserved amino acid changes in the ligand binding domain Hawkins and Thomas (2004) Pimephales promelas Molecular characterization of erα, erβ1 and erβ2. Ontogenic expression profile in selected tissues Filby and Tyler (2005) Fundulus heteroclitus Cloning of erα, erβ1 and erβ2. Difference in levels of expression in populations exposed to pollutants Greytak and Callard (2007) Dicentrarchus labrax Characterization, cloning and expression of erα, erβ1 and erβ2.

Celebensis, O. mekongnensis, P. reticulata, O. niloticus, D. , 2007). Notably, O. latipes and its sister species O. curvinotus and O. luzonensis possess an XX/XY sex determination system. However, the sex chromosomes of O. luzonensis display only a weak reduction of the recombination frequency and recombine well around the sex determining region, in contrast to the highly restricted sex chromosome of O. latipes. Hence the sex chromosomes of O. luzonensis must be ‘younger’ than that of O. , 2007).

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