"A good number of genes are conserved across species," he said. The resulting comparative maps make it possible to estimate the degree of linkage conservation between these two species. This Similar results are shown by the 18S- 5 .8S-25S probe hybridization: the telomeric region of chromosome 4 is free of hybridization signal, and no minor centromeric signals could be detected on any chromosome (Fig. Cowpea (Vigna unguiculata L.) vegetable plays a vital role in the health and nutritional security of human being and it belongs to the family of fabaceae, is a diploid with chromosome number 2n=22 and genome size is 600 Mb. The diploid numbers of chromosomes are essentially constant within the same species. Cowpea is a diploid member of the Fabaceae family with a chromosome number 2n = 22 and a … is an important food legume in the tropics. This first map was based on 87 random genomic and 5 cDNA RFLPs, 5 RAPDs and some morphological traits representing 10 linkage groups (LGs) spanning 680 cM, although cowpea has a chromosome number of n=11. Data are presented on chromosome length, arm ratio, centromere position and chromosome pattern for the 11 bivalents at pachytene. Its gene pool includes the cultivated cowpea and its wild relatives, which are … 1A). Cowpea feeds millions of people in the developing world with an annual world production estimated at about 4.5 million metric tons on 12 to 14 million ha. SELFING Cowpea is being a self pollinated crop it dose not required any artificial selfing methods but for the betterment we generally go for bagging of the mature flower bud. INTRODUCTION Cowpea (Vigna unguiculata L.), belongs to the family leguminaceae, is one of the most important vegetable crops, with chromosome number 2n=22 and originated from Central Africa. From a cytogenetic viewpoint, relatively little is known about Vigna species (Saccardo et al. described the karyotype of cowpea as being composed of one very long chromosome and one very short chromosome, with the remaining nine chromosomes being allocated to three groups of intermediate size. It is one of the most widely adapted, versatile and nutritious grain legumes. It’s a good source of protein, carbohydrate, fat, vitamins and phosphorous. Cowpea, also known as black-eyed pea, belongs to section Catiang (DC) Verdc. Some of the most insidious genetic diseases are the result of extra copies of these chromosomes. Cytology o Diploid chromosome number is 2n=2x=22 o 11 bivalent complement consists of 1 short(19 micron m.) 7 medium(26-36 micron m.) 3 long(41-45 micron m.) 14. Our data showed that cowpea has highly distinct … Both gerera with Chromosome number 2n = 22 are predominantly self-fertilizing. 1b). Introduction. Some varieties of cowpea are used specifically for wildlife purposes (Ball et al., 2007). All the cultivated cowpea, Vigna unguiculata (L.) Walp. Cowpea (Vigna unguiculata (L.) Walp) is an important legume, particularly in developing countries. The Rk locus has been mapped on chromosome Vu04 (Huynh et al. Pusa Dophasali, b. 16. Cowpea is one of the oldest source of human food. Nigeria is the largest producer of cowpea in Africa (Agboola, 1979) ... Chromosome ID Number of SNP markers Length (cM) chromosome structure, or even in chromosome number is 1995), Muduli and Mishra, 2007) known as chromosomal mutation. Mukherjee (1968) studied the pachytene chromosomes and reported that the 11 bivalent complement, consisted of 1 short (19 µm), 7 medium (26-36µm), and 3 long (41-45 µm) chromosomes. (subgenus Vigna sect. The number of cowpea-specific genes was further reduced to 578 by microarray-based genomic hybridization with DNA of cowpea and adzuki bean (Vigna angularis), a close relative of cowpea, where only 20 fewer unigenes were recognized as cowpea specific . The resolution of the map was approximately 7.0 cM between loci. Cytology. We used molecular cytogenetics to characterize the structure of pachytene chromosomes to advance our knowledge of chromosome and genome organization of cowpea. We used molecular cytogenetics to characterize the structure of pachytene chromosomes to advance our knowledge of chromosome and genome organization of cowpea. Maps make it possible to estimate the degree of linkage conservation between these two species Fabaceae family ), is..., carbohydrate, fat, vitamins and phosphorous is 22 used to generate mapping population between and. Cowpea are used specifically for wildlife purposes ( Ball et al., 2007 ), indicating the possibility of fusions... 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