Genetic variation and heritability for quantitative traits in rice (Oryza sativa) under sodic soil

Abstract

The present investigation was carried out during 2016-17 at NDUA&T, Ayodhya to assess the genetic variation and heritability for quantitative traits in rice (Oryza sativa L.) under sodic soil. The experimental materials of rice comprised of 10 genotypes as lines (females) and three testers (males), viz. Pusa Basmati-1, CSR-10 and N.Usar-2009. Each of three testers was crossed with 10 lines during kharif 2016. The genotypes were grown during kharif 2017 and evaluated along with their parents and one check varieties (Narendra Usar-3) in randomized complete block design with three replications. The experiment was conducted at soil having pH 9.2, EC-2.21 dS/m and ESP 43%. The analysis of variance revealed that all the treatments, viz. parents, parent vs crosses, crosses, lines and testers were highly significant for majority of the yield and its contributing traits. The estimates of phenotypic coefficient of variation were higher than genotypic coefficient of variation for all the traits. Estimate of high heritability (broad sense) coupled with high genetic advance in percent of mean were observed for the characters like grain yield/plant, biological yield/plant, grains/panicle, panicle bearing tillers/plant, spikeley's/panicle, chlorophyll content and flag leaf area indicating the involvement additive gene action. The moderate narrow sense heritability with low genetic advance in percent of mean were observed for panicle length and harvest index indicating presence of non-additive gene action suggesting heterosis breeding may be useful for rice improvement in sodic soil.

Influence of Organic Nutrients on Growth and Yield of Summer Greengram (Vigna radiata)

“…Therefore, yield per hectare became higher and profitable. Similar findings were reported by Yadkar et al [22] and Yadev et al [23]. Thus, adoption of organic farming can be an advantage to achieve a sustainable and eco-friendly environment [24][25][26][27][28].…”

Effect of Crop Establishment Methods and Fertility Management on Growth, Yield and Economics of Rice (Oryza sativa L.)

“…According to statistics from both years, treatment with 50% RDF + 25% RDN through [V.C.] + 25% RDN through FYM resulted in the lowest grain yield [16] as well as [17] discovered that higher yields might be ascribed to the combination application of the recommended dose of inorganic fertiliser, which promoted better nutrient availability along with higher nutrient digestion and ultimately increased grain output.…”