Components in cowpea

Assessment of genetic diversity of Vigna unguiculata (L.) Walp (cowpea) accessions using informative molecular markers is imperative for their genetic improvement and conservation. The reproducible bands were scored for analyses of dendrograms, principal component analysis, genetic diversity, allele frequency, polymorphic information content, and population structure.

13p vinarcissa 21-03-2023 4 1   Download

Productivity of cowpea [Vigna unguiculata (L.) Walp] in sub-Sahara Africa is curtailed by a lack of farmer-preferred and improved cultivars and modern production technologies. The objectives of the study were to determine the extent of genetic diversity present among a collection of cowpea accessions from Zambia and Malawi using phenotypic traits and single nucleotide polymorphism (SNP) markers and, to select distinct and complementary parental lines for cultivar development.

16p vihagrid 30-01-2023 6 3   Download

Thirty genotypes of cowpea were grown during the rainy season of 2014-2015 to study the interrelationship among quantitative traits. The experiment was laid out in a randomized complete block design (RCBD) with three replications at the Research Field of the Department of Plant Breeding and Genetics, MPUAT University, Rajasthan.

9p angicungduoc8 07-11-2020 13 1   Download

In the present study, variability, genotypic correlation coefficients, phenotypic correlation coefficient and path coefficient values in respect of six quantitative traits are estimated from the F3 generation derived from the cross between C-152 × V-16.

9p angicungduoc8 07-11-2020 17 1   Download

Generation mean analysis study in cowpea was undertaken to estimate the gene action operating in the inheritance of yield and its components. Six basic generations viz., P1, P2, F1, F2, BC1 and BC2 of five crosses, namely Pant lobia-1 x BRDCP-11 (cross I), Pant lobia-2 x GC-3 (cross II), Waghi local x W-203-1 (cross III), KM-5 x GC-3 (cross IV) and GC-3 x CDP-107 (cross V) were studied. Scaling test was applied to test the adequacy of additive-dominance model for the traits under investigation.

10p chauchaungayxua8 03-10-2020 15 2   Download

The present investigation entitled “Diallel Analysis in Cowpea (Vigna unguiculata (L.) Walp.)” was conducted during kharif, 2013.Seven diverse cowpea parents were selected and crossed in half diallel fashion in order to determine heterosis to identify promising hybrids for eleven traits including yield and its components.

7p chauchaungayxua8 03-10-2020 11 2   Download

The present investigation entitled “Diallel Analysis in Cowpea (Vignaunguiculata (L.) Walp.)” was conducted during kharif, 2013. The present study involves seven parents which were crossed in half diallel fashion in order to determine heterosis and combining ability. Seven parents viz., GC-3, CPD-91, HC-08-02, PGCP-1, GC-06-01, JOB-129 and CP-105, their resultant 21 crosses along with two standard checks viz., VCM-8 and Phule Pandhari were grown during Kharif 2013 in a Randomized Block Design with two replications.

13p chauchaungayxua8 03-10-2020 9 1   Download

Hence it is very necessary to estimate genotypic correlation coefficients for designing to reliable and efficient breeding programme. The knowledge of association among component of economically importance and other traits can helps in improving the efficiency of selection by making possible use of suitable combination of characters in an improvement programme.

5p quenchua8 29-09-2020 12 1   Download

Twenty eight cowpea entries of Agricultural Research Station, Virinjipuram were evaluated for yield and its components during two seasons Kharif 2014 and Rabi 2015. Wide range of variability was observed for various characters.

4p nguaconbaynhay7 15-08-2020 12 1   Download

A field experiment was conducted to know the effect of growth retardants viz, Maliec hydrazide (MH), Cycocil (CCC) and Lichocin on growth characters, seed quality, yield and yield components in cowpea during the Rabi season 2016-17. The experiment was laid out in RBD with three replications. Results revealed that the application of growth retardant reduced the plant height. The minimum plant height was recorded in MH (500 ppm).

5p kethamoi4 16-04-2020 13 1   Download

The phenotypic coefficient of variation was found to be higher than the genotypic coefficient of variation for all the traits studied. The highest magnitude of GCV was observed for pod weight followed by number of pod clusters plant-1 , seed yield plant-1 , 100 seed weight, pod length, number of pods cluster-1 and number of pods plant-1 . All the characters considered except number of primary branches plant-1 , number of pods plant-1 and seed yield plant-1 recorded high estimates of heritability.

7p quenchua4 16-04-2020 11 1   Download

Correlation and presence of genetic interactions was studied using F2 and F3 generations in two cowpea crosses for yield and its component traits. Most of the characters studied were positively skewed and were being governed by several genes indicating quantitative inheritance. Variance, skewness and kurtosis have also indicated that homozygosity has increased from the generation to generation in cowpea crosses. Cross A (C-152 × V-16) was found better than crossB (C-152 × V-57817) in providing high yielding segregants displaying parental diversity.

7p trinhthamhodang4 22-03-2020 13 1   Download

The present experiment was carried out on correlation and path analysis in cowpea [Vigna unguiculata (L.) Walp.] during 2016-17. The study was consists 30 genotypes of cowpea using randomized block design with two replications.

8p nguaconbaynhay4 22-03-2020 24 2   Download

Generation mean analysis study in cowpea was undertaken to estimate the gene action operating in the inheritance of yield and its components using six basic generations viz. P1, P2, F1, F2, BC1 and BC2 of two different crosses namely PGCP-63 X Pant Lobia-1 and Pant Lobia-3 x Pant Lobia-1 were studied. For most of the studied traits, additive, dominant, additive x additive, additive x dominance and dominance x dominance were significant. Additive effect significantly contributed for number of pods per plant and 100 seed weight.

7p cothumenhmong1 08-12-2019 5 0   Download