Infraspecific variation of Sechium edule (Jacq.) Sw. in the state of Veracruz, Mexico

Abstract

In this study a morphological and anatomical variation analysis was carried out with leaves and fruits of Sechium edule, collected in the central region of Veracruz, Mexico. The collected fruits were classified in eight groups according to their typical characteristics. The results showed that the phenotypical distinction of the studied infraspecific S. edule complex is related to morphological and anatomical changes in order to improve the adaptive specialization of the different chayote types with respect to the environment, and suggests that cultivated chayotes have followed different routes in the process of coevolution with man, showing stable variation patterns in the so-called ''green'' and ''yellow'' groups. Considering the phenotypic variability existing in the analyzed characters, a certain prediction may be proposed about the direction the variation patterns may follow facing the transference of chayotes to environments of lower altitudes than mountain cloud forest.

A comparative assessment of morphological and molecular diversity among Sechium edule (Jacq.) Sw. accessions in India

“…Sanwal et al (2010) observed a similar morphological diversity in the North-Eastern germplasm of India as that of Kapoor et al (2014) with the length of the fruit (5.70-15.80 cm), diameter (5.2-10.90) and weight (134-406 g) showing maximum variations. In a study conducted by Cadena-Iniguez et al (2008) fruits of Sechium edule were collected in the central region of Veracruz, Mexico, and classified them under eight groups according to their characteristics. The fruit length varied from 3 to 15 cm which is similar as obtained in the present study.…”

Isolation and Characterization of Novel Microsatellite Markers in Chayote [<i>Sechium edule</i> (Jacq.) Sw.]

“…Flanked regions of the microsatellite were isolated from these four DNA libraries by amplification using compound microsatellite primers (AC) 10 or (GA) 10 and the adaptor primer AP2 (5'-CTATAGGGCACGCGTGGT-3') designed from the 48-mer adapter. The amplified fragments were then integrated into a plasmid pGEM-T vector using pGEM-T Easy Kit (Promega); the plasmids were then transferred into Escherichia coli DH5α, according to the manufacturer's instructions.…”

“…A total of 40 clones from the (AC) 10 and 24 clones from the (GA) 10 libraries were randomly chosen based on amplification size (≥500 bp) and were sequenced. Eighteen (45%) and 9 (37.5%) clones, respectively, from each library, had enough sequence length to design two primers between repeat motif and adapter sequences, and they were used to design IP1 and IP2 primers.…”

Traditional knowledge on integrated pest and weed management in chayote (Sechium edule (Jacq.) Sw.) crops from localities of Chiapas, Mexico

“…The reported researches of this crop, focused primarily on genetic traits (Cadena, Avendaño, Soto, Ruiz, Aguirre & Arévalo, 2008;Cadena, Arévalo, Ruiz, Aguirre,Soto, Luna & Zavaleta, 2006;Cadena, Arévalo, Avendaño, Ruíz, Soto, Santiago, Acosta, Aguirre, Cisneros & Ochoa, 2007;Cadena, Soto, Torres, Aguiñiga, Ruiz, Rivera, Avendaño & Santiago, 2013), physiological aspects of water relations and gas exchange, in vitro micro-propagation (Abdelnour, Bermúdez, Alvarenga & Rivera (2006); Alvarenga, Abdelnour & Villalobos (2007) and more recently, participative plant breeding (Avendaño, Cadena, Arévalo, Cisneros, Morales & Ruiz, 2014).…”