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Light initiated fruit body primordia of Coprinus congregatus Bull, ex Fr. grown at relatively high temperature (25°C) require a single dark period or low-temperature induction for completion of fruit-body development. The dark period requirement varied with the temperature regime during the inductive dark period A minimum requirement of 2.5 h was found al 15–20°C. Darkness always promotes development of fruit-body primordial, but cannot, be regarded as an absolute necessity until temperature exceeds about 17.5°C. Normal development of me primordia without darkness was obtained by lowering the temperature to 10°C for 6 h. It appeared that at high temperatures two successive stimuli were required for basidiocarp maturation, a light-off and a subsequent signal light-on signal. On the contrary, at 10°C a single low-temperature signal seemed to be involved. Thus, induction of fruit-body development could be produced by alternative pathways. These developmental features have been extended to other fungi and compared with the flowering processes of some short-day plants. 相似文献
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YONG M.; GUTIERREZ A.; PERERA G.; DURAND P.; POINTIER J.P. 《Journal of Molluscan Studies》2001,67(1):103-112
Conchological, anatomical and genetic characteristics werecompared
among several populations of the Biomphalaria havanensis
complexfrom Cuba and other localities in the Caribbean region. Two
morphometricmeasures (height and diameter) distinguished two closely
similarmorphs of the shell. The reproductive system also separated
thesemorphs, particularly upon comparison of sizes of the penis
sheathand the preputium. The two morphological groups differed in9
to 12 fixed alleles according to population. Further allozymicdata
analyzed in the present work confirmed this difference.The results
strongly support the assumption that the B. havanensis
complexincludes two distinct species: B. havanensis, for
which thetype locality is the swampy area near the vicinity of
Havana,Cuba and Biomphalaria sp. a species which commonly
occurs inCuba and in Dominican Republic. The taxonomic identity of
Biomphalariasp. is discussed. (Received 28 January 2000; accepted 15 August 2000) 相似文献
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DURAND P 《Annales de l'Institut Pasteur》1950,79(5):579-590
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Bayesian clustering algorithms ascertaining spatial population structure: a new computer program and a comparison study 总被引:1,自引:0,他引:1
CHIBIAO CHEN ERIC DURAND FLORENCE FORBES OLIVIER FRANOIS 《Molecular ecology resources》2007,7(5):747-756
On the basis of simulated data, this study compares the relative performances of the Bayesian clustering computer programs structure , geneland , geneclust and a new program named tess . While these four programs can detect population genetic structure from multilocus genotypes, only the last three ones include simultaneous analysis from geographical data. The programs are compared with respect to their abilities to infer the number of populations, to estimate membership probabilities, and to detect genetic discontinuities and clinal variation. The results suggest that combining analyses using tess and structure offers a convenient way to address inference of spatial population structure. 相似文献
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