Relationship Between some Growth Parameters, Dry Matter Content and Yield of Some Sweet Potato Genotypes Grown under Rainfed Weathered Ultisols in the Humid Tropics

Abstract

A field study was initiated to generate information on dry matter yield and some biometric parameter effects on yield of seven sweet potato genotypes in weathered ultisols in the humid tropics. The experiment, which was laid out in a randomize complete block design with four replications was conducted at National Root Crops Research Institute, Umudike, Abia State, Nigeria (05°29'N, 07°32'E,122 m asl). Umuspo 1 (31.2 t haG 1), closely followed by TIS 87/0087 (27.45 t haG 1) significantly (p<0.01) gave the highest storage root yield compared to the other genotypes and also exhibited highest Bulking Rate (BR) (7.78 g dayG 1), Total Dry Matter yield (TDM) (71.99 g plantG 1), Crop Growth Rate (CGR), Relative Growth Rate (RGR) and Absolute Growth Rate (AGR). High yield of Umuspo 1 was partly due to greater partitioning of assimilates to the storage roots relative to the other genotypes. The mean sequence of TDM content and BR at 56 Days after Planting (DAP) in the genotypes was in the order: Umuspo 1>Solomon 4 > Ex-Igbariam>TIS 87/0087>TIS 8164>Umuspo 3>Centinneland Umuspo 1 >TIS 87/0087>TIS 8164>Solomon 4>Ex-Igbariam>Umuspo 3>Centinnel, respectively. Storage root yield had significant (p#0.01) and positive correlation with number of storage roots/plant with correlation coefficients (r) of 0.53, bulking rate (r = 0.99), crop growth rate (r = 0.59), absolute growth rate (r = 0.59) and total dry matter at 2, 4, 6 and 8 weeks after planting. Umuspo 1 may be adjudged to be better endowed genetically because of its high dry matter content, early bulking ability and high yield potential recorded in the study.

Correlations between Growth and Yield Parameters of Soybean (Glycine max (L.) Merr.) under the Influence of Bradyrhizobium japonicum in Kipushi (The Democratic Republic of Congo)

“…The NL is a parameter that determines the photosynthetic efficiency of a plant and consequently its performance on SY. However, it is influenced by several factors including the environment (Talebi et al, 2010;Mbarek et al, 2012;Chandel et al 2014;Mbah and Eke-Okoro, 2015). Furthermore, NP is one of the most important yield parameters that determine the number of seeds per plant.…”

Evaluation of orange-fleshed sweetpotato genotypes for yield and yield contributing parameters in two environments

“…Tsegaye et al (2006) and Gedamu et al (2010) also got the root yield significantly negatively correlating with dry matter content of roots. But, Mbah and Eke-Okoro (2015) got a positive and significant correlation between root yield and dry matter content of roots. Root yield was not correlated with root length (in Blitar) and amylum content (in Mojokerto).…”

“…Ambarsari et al (2009), state that in Indonesia sweetpotato ranks fourth after rice, maize, and cassava. Besides carbohydrates, sweetpotatoes are also rich in fiber, minerals, vitamins, and antioxidants (Kure et al 2012;Mbah and Eke-Okoro 2015;Rodriguez-Bonilla et al 2014). Orangefleshed sweetpotatoes (OFSP) is one of the most important sources of carbohydrates and vitamins (beta carotene).…”

Growth analysis and yield performance of four potato (Solanum tuberosum L.) Varieties

“…More than 70 high yielding varieties (HYVs) of potato have been released for cultivation in our Plant growth analysis, a collective technique used to quantify the components of growth such as crop growth rate, relative growth rate, net assimilation rate, specific leaf area etc. which regulate the crop yield that is a function of total dry matter production and its effective distribution on to economically important plant parts (Mbah and Eke-Okoro, 2015). These growth parameters allow describing the growth of the plant or plant organ and the relationship between the assimilatory apparatus and dry matter production (Olivera, 2000).…”