Results 21 to 30 of about 1,056 (195)
Sexual Size Dimorphism in Rays and Skates (Elasmobranchii: Batoidea). [PDF]
Ecol EvolInterspecific trends in sexual size dimorphism are superficially similar in batoids to sharks, but are underlain by different modes of evolution. Selection for substantial SSD in batoids seems to be weaker than in sharks. This may be due to differences in the strength of fecundity selection.
Gayford JH +4 more
europepmc +2 more sources
Polyembryony in non-apomictic citrus genotypes
Annals of Botany, 2010 Background and Aims Adventitious embryony from nucellar cells is the mechanism leading to apomixis in Citrus sp. However, singular cases of polyembryony have been reported in non-apomictic genotypes as a consequence of 2x × 4x hybridizations and in vitro
Pablo Aleza +2 more
exaly +2 more sources
The adaptability of facultative parthenogenesis and ‘multiple embryos per eggcase’ as alternative reproductive strategies in Chondrichthyes [PDF]
Royal Society Open ScienceChondrichthyans (sharks, rays and chimaera) are a fascinating case study through which to examine reproductive biology. While most vertebrate lineages have converged upon either placental viviparity or oviparity, chondrichthyans exhibit unparalleled ...
Joel Harrison Gayford
doaj +2 more sources
Apomixis and Polyembryony in the Guggul Plant,Commiphora wightii [PDF]
Annals of Botany, 1996 The present report is a part of our study on the reproductive biology of a traditional Indian medicinal plant,Commiphora wightii, a source of guggul steroids.
Promila Gupta +2 more
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PUTATIVE LOCI ASSOCIATED TO POLYEMBRYONY IN MAIZE POPULATIONS
Tropical and Subtropical Agroecosystems, 2012 Polyembryony (PE) is a reproductive phenomenon that produces more than one plant per seed in maize and other species. The objective of this study was to identify polymorphic DNA bands associated to the genetic expression of this trait using AFLPs.
Jose Gerardo Gaona-Lozano +5 more
doaj +1 more source
Revista Brasileira de Fruticultura, 2013 A poliembrionia é um caráter fundamental no melhoramento genético e na multiplicação comercial de porta-enxertos de citros. Este trabalho avaliou as relações entre poliembrionia e diferentes atributos morfológicos de sementes de 12 genótipos de citros ...
Fernanda Emilia Vital de Oliveira Duarte +4 more
doaj +1 more source
Agronomic performance of maize (Zea mays L.) populations segregating the polyembryony mutant
Revista de la Facultad de Ciencias Agrarias, 2019 The maize polyembryony (PEm) is phenotypically expressed when the seed germinates in two or more seedlings simultaneously, which in turn develops the capacity to overcome the close competition among sisters and neighboring plants. Because of that, it is
Juan Samuel Guadalupe Jesús Alcalá-Rico +5 more
doaj +4 more sources
Ciência e Agrotecnologia, 2006 Objetivou-se com este trabalho, avaliar a taxa de poliembrionia e caracterizar os frutos dos porta-enxertos citrumelo cv. Swingle e Poncirus trifoliata. O experimento foi realizado na Universidade Federal de Lavras.
José Darlan Ramos +4 more
doaj +2 more sources
Reproductive Biology Factors Hampering Lemon [Citrus limon (L.) Burm. f.] Genetic Improvement
Agriculture, 2022 Background: Floral sterility and nucellar embryony are peculiar traits of several Citrus species and represent an obstacle to traditional breeding. Morphological sterility mainly results in pistil abortion and anther atrophy, while polyembryony is due to
Chiara Catalano +9 more
doaj +1 more source
Annals of Tropical Research, 2020 Makapuno is a rare, high-value coconut in the Philippines known for its extraordinary thick gelatinous meat with various uses in the food industry. Homozygous makapuno embryos do not germinate in vivo so plantlets are produced in vitro.
Daisy Jane A. Toting +2 more
doaj +1 more source