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Researcher Nancee
Advisor Rana, M. K.
Source KrishiKosh-Indian National Agricultural Research System
Content type Text
Educational Degree Doctor of Philosophy (Ph.D.)
Publisher CCSHAU
File Format PDF
Language English
Subject Domain (in DDC) Natural sciences & mathematics ♦ Physics ♦ Light & infrared & ultraviolet phenomena ♦ Life sciences; biology ♦ Genetics and evolution
Subject Keyword Horticulture ♦ Genotypes ♦ Planting ♦ Harvesting ♦ Yields ♦ Cowpeas ♦ Diseases ♦ Genetics ♦ Developmental Stages ♦ Sowing ♦ Biological Phenomena
Abstract The extent of genetic variability for quantitative traits was assessed in 46 genotypes of cowpea along with nature and magnitude of association between pod yield and its component traits. Also, the magnitude of genetic divergence of genotypes was assessed. The present studies revealed that leaf form, flower colour, pod colour and plant growth habit were found to be important diagnostic characters for varietal identification in cowpea. Analysis of variance revealed significant difference among the genotypes for all the characters. High GCV and PCV coupled with high heritability and genetic advance were recorded for length of pod, weight per pod, number of pod per plant, pod yield per plant, number of seeds per pod, plant height at final harvest and harvest index. Also, positive association was observed with weight per pod, number of pods per plant, length of pod and breadth of pod. Path analysis revealed that weight per pod, days to last picking and harvest index had considerable influence on pod yield. Mahalanobis D2 statistics indicated considerable diversity and genotypes were grouped into eight clusters. The cluster IV was the largest with 15 genotypes followed by cluster VII with 11, cluster III had 6, cluster I, V, VI and VII comprised 3 genotypes, and cluster II had 2 genotypes. Maximum inter cluster distance was observed between V and VIII, indicating maximum divergence among genotypes. The highest intracluster distance was recorded for cluster V (5.14). The highest contribution to the diversity was recorded by number of seeds per pod and plant height at final harvest.
Educational Use Research
Education Level UG and PG
Learning Resource Type Thesis
Size (in Bytes) 10.76 MB