Zhao Hongxia Guo Shuai, Zhao Lanyong
In this experiment, 28 taxonomic characters were selected, and the samples of Yizhou Begonia 1 1 were preliminarily studied by applying the principles and methods of quantitative taxonomy developed in recent years. The results show that it is feasible to study the variety classification of begonia in Yizhou by mathematical method. The results of cluster analysis reflect the genetic and evolutionary relationship among varieties. R-cluster analysis shows that the selection of characters is correct, and there is no obvious logical relationship between classified characters, which is of independent significance to the evolution of varieties.
Keywords: quantitative classification; Yizhou begonia
China Library Classification Number: S685 Document Identification Number: A Document Number:1000-2324 (2003) 03-0379-04.
Quantitative classification of papaya in Yizhou
Zhao Hongxia? 1, Guo Shuai? 2. Zhao Lan-Yong? 2?
(1. Vocational and Technical College of Liaocheng University, Liaocheng 252059; 2. College of Forestry, Shandong Agricultural University, Taian 27 10 18, China)?
Abstract: Using the numerical taxonomy developed in recent years, the 1 1 species and 28 characters of' Yizhou' papaya were preliminarily studied. The results show that it is feasible to classify papaya varieties in Yizhou. Q-cluster analysis reflects the genetic relationship of all varieties. R cluster analysis showed that the selection of test characters was basically correct, and there was no obvious logical relationship among the characters, which had an independent influence on the evolution of varieties.
Key words: numerical taxonomy, Yizhou papaya
Yizhou' papaya is an important ornamental plant of Rosaceae, which is widely cultivated in Linyi, Shandong, Xinyi and Shuyang, Jiangsu. Academician Chen Junyu visited Linyi from 65438 to 0996, and thought that Yizhou begonia was a new ornamental resource, which was obviously different from sessile begonia and papaya begonia, and was named Yizhou begonia. Yizhou begonia is gorgeous and graceful, which is an excellent ornamental plant, deeply loved by people and shows great market potential in the flower market at home and abroad.
Due to long-term cultivation, there are many varieties of Yizhou begonia, but the origin and genetic relationship of Yizhou begonia are still unclear. In addition, the naming of Yizhou begonia varieties is also confusing, and the phenomenon of "the same thing with different names" and "foreign objects with the same name" is common. The existence of these problems restricts the cultivation of new varieties of Yizhou begonia and brings inconvenience to the intensive production of Yizhou begonia. There are several theories about the origin of Yizhou begonia: First, Yizhou begonia is a variety of papaya in a mountainous area of Zhejiang; Secondly, Yizhou Haitang is a hybrid of local farmers and papaya. Thirdly, Yizhou begonia is made by grafting local fruit wrinkled papaya and papaya. However, all the above statements lack reliable evidence.
According to literature retrieval, there is no research report on the quantitative classification and genetic relationship of Begonia in Yizhou. This paper attempts to make a preliminary study on the genetic relationship of various varieties and types of begonia in Yizhou by means of quantitative taxonomy in order to attract more attention. From 65438 to 1950s, the birth of quantitative taxonomy introduced mathematical methods and computer technology into the study of plant taxonomy, which made the study of plant taxonomy move from qualitative and descriptive level to accurate and quantitative level. A large number of practices have proved that the quantitative classification method can comprehensively analyze a large number of biological characters, get rid of the subjectivity of traditional classification and get more correct classification results [1]. Now, quantitative taxonomy has been successfully applied to the classification of plum blossom [2], osmanthus fragrans [3], orchid [4], lotus [5], peach blossom [6] and peony [7].