Genetic variation and relationships of total seed protein content with some agronomic traits in pigeonpea (Cajanus cajan (L.) Millsp.)

Obala, J and Saxena, R K and Singh, V K and Vechalapu, S and Das, R R and Rathore, A and Sameer Kumar, C V and Saxena, K B and Tongoona, P and Sibiya, J and Varshney, R K (2018) Genetic variation and relationships of total seed protein content with some agronomic traits in pigeonpea (Cajanus cajan (L.) Millsp.). Australian journal of crop science, 12 (12). pp. 1859-1865. ISSN 1835-2707

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Abstract

Seed protein content (SPC) is an important grain quality trait, which impacts the nutritional importance of pigeonpea seed in the diet of over a billion people globally. The present study was carried out to determine variation in SPC and its relationships with some agronomic traits among 23 parental lines of different types of pigeonpea mapping populations. The parental lines were evaluated under field conditions during 2014-2015 growing season. A randomised complete block design in two replications was used. Data were recorded on SPC, days to first flower (DTF), plant height at maturity (PltH), number of pods per plant (NPP), number of seeds per pod (NSP), hundred-seed weight (SW) and seed yield per plant (SY). There were significant differences among genotypes for all traits. Broad-sense heritability was 0.693 for SPC but ranged from 0.519 (NPP) to 0.999 (DTF) while genetic advance was 2.4% for SPC but ranged from 1.2 % (NSP) to 141.2 % (SY), and genetic gain ranged from 11.0 % (SPC) to 230.0 % (SY). Simple correlation showed that SPC is only significantly but negatively correlated with SW (r = -0.30, P < 0.05), while path analyses revealed that SPC is negatively associated SW and NPP but positively with DTF, PltH, NSP and SY. It is concluded that genetic variation for SPC and agronomic traits exist among pigeonpea genotypes studied. The variation is accompanied by both favourable and unfavourable relationships of SPC with the agronomic traits.

Item Type: Article
Divisions: Research Program : Asia
Research Program : Genetic Gains
CRP: CGIAR Research Program on Grain Legumes
Uncontrolled Keywords: Cajanus cajan, dietary protein, genetic advance, correlation, path analysis, heritability
Subjects: Mandate crops > Pigeonpea
Others > Genetics and Genomics
Depositing User: Mr Ramesh K
Date Deposited: 22 Jan 2019 10:04
Last Modified: 22 Jan 2019 10:06
URI: http://oar.icrisat.org/id/eprint/11045
Official URL: https://www.cropj.com/december2018.html
Projects: UNSPECIFIED
Funders: UNSPECIFIED
Acknowledgement: We thank the United States Agency for International Development (USAID) and ICRISAT for funding various projects related to pigeonpea genomics at ICRISAT. This work has been undertaken as part of the CGIAR Research Program on Grain Legumes. ICRISAT is a member of CGIAR Consortium
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