Genetic Diversity of Morus Species of Indigenous and Exotic Accessions Evaluated by Important Agronomical Traits


Amalaendu Ticader* and Chandrakana K. Kamble

Central Sericultural Germplasm Resource Center
Thally Road, Tamil Nadu, India

*corresponding author: This email address is being protected from spambots. You need JavaScript enabled to view it./



The genetic diversity and relationship among 50 mulberry germplasm accessions from India and abroad were evaluated for 8 agronomical important traits at Central Sericultural Germplasm Resources Centre (CSGRC), Hosur, Tamil Nadu, India. Significant variations between indigenous and exotic mulberry accessions were observed in different agronomical traits. There were significant variations in 8 agronomic traits among the tested mulberry accessions. Genetic background and environment are the main factors influencing leaf yield. Correlation matrix of different traits showed that leaf yield is a combination of multiple traits and plays a significant role. Ward’s minimum variance cluster analysis based on Mahalanobis distances of 8 agronomic traits grouped the indigenous and exotic accessions into 9 clusters. Maximum accessions were grouped in cluster VI and minimum in cluster VIII. The CIMMYT selection indices were employed to group and select the suitable mulberry accessions. Indian accession MI-0416 performed better followed by MI-0376 and Thailand accession ME-0058 than other test germplasm accessions. Both the Indian and exotic accessions have the potential to select and could be important germplasm resources for enriching the genetic background of Indian mulberry accessions through crop improvement program.



The horizontal expansion of sericulture in traditional and non-traditional states has made it necessary to develop mulberry varieties specific to different agro-climatic zones. The importance of research for the progress of sericulture in India was realized in the beginning of the 19th century. Before India's independence, sericulture was mostly practiced in the traditional belt of West Bengal, Jammu & Kashmir, Uttar Pradesh, Assam, and Karnataka. Sericulture gained momentum with the establishment of the Central Silk Board (CSB) in 1949, as a national nodal agency for planning, monitoring, and extension of sericulture development program in the country. Presently, sericulture is widely distributed in different states of India. The different research institutes have been involved in developing improved varieties to cope with increasing demand and, subsequently, more exotic mulberry germplasms were introduced in India and used as parent material for crop improvement. Presently, the improved varieties in use are mostly developed involving exotic accessions as parent (Tikader & Kamble 2007).





BRADSHAW AD. 1977. Some of the evolutionary consequences of being a plant. Evol Biol 5: 25-47.

CAPPELLOZZA L, CORADAZZI AT, TORNADORE N. 1995. Studies on phenotypic variability of seven cultivars of M. alba L. and three of M. multicaulis P. (Moraceae) Part I. Sericologia 35: 257-270.

CAPPELLOZZA L, CORADAZZI AT, CAPPELOZZA S, BALDAU B, MARIANI P. 1996. Studies on phenotypic variability of seven cultivars of M. alba L. and three of M. multicaulis P. (Moraceae) Part II. Sericologia 36: 91-102.

FOTEDAR RK, DANDIN SB. 1988. Genetic divergence in mulberry. Sericologia 38: 115-125.

HEIDE O. 1985. Physiological aspects of climatic adaptation implants with special reference to high latitude environments, In: Kaurin A, Junttila O & Nilson J eds. Oslo: Norwegian University Press p. 1-22.

KATSUMATA F. 1972. Mulberry species in West Java and their peculiarities. Journal Seric Sci Japan 43: 213-223.

MACHII H, KOYAMA A, YAMANOUCHI H, MATSUMOTO K, KOBAYASHI S, KATAGIRI K. 2001. Morphological and agronomical traits of mulberry. Misc Pub Natl Inst Seric Ent Sci 29: 1-307.

MAHALANOBIS PC. 1936. On the generalized distance in statistics. Proc Natl Inst Sci India 2: 49-55.

RABBANI MA, MURAKAMI YAI, SUZUKI T, TAKAYANGI K. 1998. Phenotypic variation and the relationship among mustard (Brassica juncea L.) germplasm from Pakistan. Euphytica 101: 357-366.

RAJAN MV, CHATURVEDI HK, SARKAR A. 1997. Multivariate analysis as an aid to genotypic selection for breeding in mulberry. Indian J Seric 36: 111-115.

RAO AA, TIKADER A, THANGAVELU K. 2004. Assessment of genetic diversity on growth and reproductive behaviour in mulberry germplasm and utilization. Indian J Forestry 27: 372-380.

SARKAR A, ROY BN, GUPTA KK, DAS BC. 1987. Character association in mulberry under close planting. Indian J Seric 26: 76-78.

THANGAVELU K, TIKADER A, RAMESH SR, RAO AA, NAIK GV, SEKAR S, DEOLE AL. 2000. Catalogue on mulberry (Morus spp.) germplasm. 2: 1-225.

TIKADER A, RAO AA, RAVINDRAN S, NAIK GV, MUKHERJEE P, THANGAVELU K. 1999. Divergence analysis in different mulberry species. Indian J Genet 59: 87-93.

TIKADER A, ROY BN. 1999. Genetic variability and character association in mulberry germplasm (Morus spp.). Indian J Forestry 22: 26-29.

TIKADER A, RAO AA. 2002. Phenotypic variation in mulberry (Morus spp.) germplasm. Sericologia 42: 221-233.

TIKADER A, ROY BN. 2002. Genetic divergence in mulberry (Morus spp.) Indian J Genet 62: 52-54.

TIKADER A, RAO AA, THANGAVELU K. 2003. Genetic divergence in exotic mulberry (Morus spp.) germplasm. Sericologia 43: 495-501. 

TIKADER A, KAMBLE CK. 2007. Mulberry breeding in India – A critical Review. Sericologia 47: 367-382.

TIGERSTEDT PMA. 1994. Adaptation, variation and selection in marginal areas, In: ROGNLI OA, SOLBORG ET, SCHJELDERUP I. eds. Breeding Fodder Crops for marginal conditions. Proceedings of the 18th Eucarpia Fodder Crop Section Meeting; 1993 August 25-28; Loen, Norway: Development in Plant Breeding 2: 13-19.

VIJAYAN K, TIKADER A, DAS KK, ROY BN, PAVAN KUMAR T. 1996. Genotypic influence on leaf moisture content and moisture retention capacity in mulberry (Morus spp.). Bulletin Seric Res 7: 95-98.

VIJAYAN K, TIKADER A, DAS KK, DOSS SG, CHAKROBORTI SP, ROY BN. 1997. Correlation studies in mulberry (Morus spp.). Indian J Genet 57: 455-460.

VIJAYAN K, DAS KK, DOSS SG, CHAKROBORTI SP, ROY BN. 1999. Genetic divergence in indigenous mulberry (Morus spp.) genotypes. Indian J Agric Sci 69: 851-853.

WARD JH. 1963. Hierarchical grouping to optimize an objective function. J Am Stat Ass 58: 236-244.

WILLIAMS WM. 1987. Adaptive variation. In: Baker MJ & Williams WM eds. Commonwealth Agricultural Bureaux International (CABI) p. 299-321.