Inheritance of seed coat color in sesame

Abstract

-The objective of this work was to determine the inheritance mode of seed coat color in sesame. Two crosses and their reciprocals were performed: UCLA37 x UCV3 and UCLA90 x UCV3, of which UCLA37 and UCLA90 are white seed, and UCV3 is brown seed. Results of reciprocal crosses within each cross were identical: F 1 seeds had the same phenotype as the maternal parent, and F 2 resulted in the phenotype brown color. These results are consistent only with the model in which the maternal effect is the responsible for this trait. This model was validated by recording the seed coat color of 100 F 2 plants (F 3 seeds) from each cross with its reciprocal, in which the 3:1 expected ratio for plants producing brown and white seeds was tested with the chi-square test. Sesame seed color is determined by the maternal genotype. Proposed names for the alleles participating in sesame seed coat color are: Sc 1 , for brown color; and Sc 2 , for white color; Sc 1 is dominant over Sc 2 .Index terms: Sesamum indicum, export market, maternal effect, seed color, sesame breeding. Herança da cor do tegumento em sementes de gergelimResumo -O objetivo deste trabalho foi determinar o padrão de herança da cor do tegumento da semente de gergelim. Dois cruzamentos com recíprocos foram feitos: UCLA37 x UCV3 e UCLA90 x UCV3, dos quais UCLA37 e UCLA90 apresentam sementes brancas e UCV3, sementes marrons. Os resultados dos cruzamentos recíprocos, dentro de cada cruzamento, foram idênticos: as sementes F 1 mostraram o mesmo fenótipo que o parental materno, e as F 2 resultaram no fenótipo semente marrom. Esses resultados são consistentes apenas com o modelo no qual o efeito materno é responsável por essa característica. Esse modelo foi validado pelo registro da cor do tegumento da semente de 100 plantas F 2 (sementes F 3 ) para cada cruzamento com o seu recíproco, em que a proporção esperada de 3:1 para plantas produzindo sementes marrons e brancas foi testada com o teste do qui-quadrado. A cor do tegumento da semente de gergelim é determinada pelo genótipo materno. Os nomes propostos para os alelos participantes na determinação da cor da semente de gergelim são: Sc 1 , para a cor marrom; e Sc 2 , para a cor branca; Sc 1 é dominante sobre Sc 2 .Termos para indexação: Sesamum indicum, mercado de exportação, efeito materno, cor da semente, melhoramento de gergelim.

Euterpe edulis seed germination parameters and genotype selection

“…Therefore, even for allogamous species, seeds from the same plant present similar germination characteristics inherited from the mother plant that are different from those presented by seeds from other plants (Laurentin & Benítez, 2014). This increases genetic variation and decreases the environmental effect, generating elevated heritability values.…”

Inheritance Pattern of Oil Content in Sesame (<i>Sesamum indicum</i> L.)

“…Obviously, performance of F1 plant is reported (Snoad and Arthur, 1974;Prakash et al, 1977) to be dependent on F1 genotype and genotype of individual embryos, even if the influence of environmental factors is ignored. Besides, possible involvement of cytoplasmic factors as in case of seed coat colour in sesame (Laurentin and Benitez, 2014) can not be denied.…”

Transcriptome Dynamics during Black and White Sesame (Sesamum indicum L.) Seed Development and Identification of Candidate Genes Associated with Black Pigmentation

“…The seed coat is the external protective layer of the seed and develops from the integument initially surrounding the ovule and is maternal in origin [ 42 ]. It protects the embryo and endosperm from external factors such as mechanical injuries, desiccation, and infections [ 13 ].…”