Journal of Food, Agriculture and Environment

Measurement of genetic diversity of native pecan [Carya illinoensis (Wangenh) K. Koch] populations established in Central Mexico and correlation with dichogamous flowering using AFLP

Author(s):

Jorge F. Cerna-Cortés ¹, June Simpson ², Octavio Martínez ³, Ramón A. Martínez-Peniche ^4*

Recieved Date: 2003-01-02, Accepted Date: 2003-08-27

Abstract:

Pecan [Carya illinoensis (Wangenh) K. Koch] is a native North American plant which is widely distributed throughout the United States and Mexico. Pecan grows naturally and is partially cultivated on the banks of many rivers in central Mexico. Since it has been reproduced from seeds derived from cross pollination, it exhibits high genetic heterogeneity which has been poorly evaluated. Interspecific variation of pecan in Central Mexico was studied using Amplified Fragment Length Polymorphism (AFLP) markers. Eighty two pecan genotypes showing contrasting morphology from four different regions of three states of Mexico (Querétaro, Guanajuato and San Luis Potosí) were analyzed. The patterns generated by AFLP were used to estimate genetic dissimilarity, which were submitted to the unweighted pair group method using arithmetic averages (UPGMA) to evaluate phylogenetic relations. In addition, dioecious flowering was documented and correlated with the molecular markers by means of a logistic model. Results showed that genetic differences in the pecan populations evaluated ranged from 3 to 17%. In addition, a certain association among populations according to geographic origin was observed, although it was not perfectly defined. Six AFLP markers associated with dichogamy were identified, constituting an original finding which could serve as a model for the prediction of a particular characteristic of a perennial plant from seedling stage. The AFLP technique used in this study proved a useful tool to detect polymorphism between closely related genotypes and to identify specific markers related to agronomic characteristics in pecan.

Keywords:

Pecan, molecular markers, intraspecific diversity, AFLP, dichogamy, Mexico

---

Journal: Journal of Food, Agriculture and Environment
Year: 2003
Volume: 1
Issue: 3&4
Category: Agriculture
Pages: 168-173

---

Full text for Subscribers

---

Information:

Note to users

The requested document is freely available only to subscribers/registered users with an online subscription to the Journal of Food, Agriculture & Environment. If you have set up a personal subscription to this title please enter your user name and password. All abstracts are available for free.

Article purchasing

If you like to purchase this specific document such as article, review or this journal issue, contact us. Specify the title of the article or review, issue, number, volume and date of the publication. Software and compilation, Science & Technology, all rights reserved. Your use of this website details or service is governed by terms of use. Authors are invited to check from time to time news or information.

---

Purchase this Article:   20 Purchase PDF Order Reprints for 15

---

Share this article :