Analysis of agro-morphological diversity and oil content in Indian linseed germplasm

Abstract

SUMMARY:One hundred and eleven accessions of linseed germplasm belonging to 32 districts of six states (Bihar, Chhattisgarh, Himachal Pradesh, Jharkhand, Madhya Pradesh and Maharashtra) in India were characterized for five qualitative and six quantitative traits. Significant variability was observed in the agro-morphological and qualitative traits. The Shannon diversity index varied from 0.23-0.70 and the phenotypic coefficient of variation ranged from 6.0% to 37.1%. IC 345425, an accession from Surgaon, Chandrapur, Maharashtra, was identified as promising for its high oil content (41.5%). The Pearson correlation matrix generated for the quantitative traits indicated that positive and high correlation was observed among days to 50% flowering and days to 80% maturity (0.9; P value <0.0001), plant height and seed weight (0.7; P value <0.0001), seed weight and oil% (0.6; P value <0.0001), seed weight and number of capsules per plant (0.5; P value <0.0001). Two major clusters were formed when the characterization data was subjected to Ward's minimum variance method. DIVA-GIS approaches for the analysis of the diversity in linseed germplasm were mapped for quantitative traits such as plant height, number of capsules per plant and seed oil content.KEYWORDS: DIVA-GIS; Diversity; Flax; Germplasm; India-Linseed RESUMEN: Análisis de la diversidad morfológica y contenido de aceite del germoplasma de linaza india. Ciento once accesiones de germoplasma de semillas de lino pertenecientes a 32 distritos de seis estados de la India (Bihar, Chhattisgarh, Himachal Pradesh, Jharkhand, Madhya Pradesh y Maharashtra) se caracterizaron mediante cinco determinaciones cualitativas y seis cuantitativas. Se observó una variabilidad significativa tanto en los rasgos cualitativos como cuantitativos. El índice de diversidad de Shannon varió entre 0,23-0,70 y el coeficiente de variación fenotípica varió entre 6,0 y 37,1 %. IC-345425, una accesión a partir Surgaon, Chandrapur, Maharashtra fue identificado como prometedora, por su alto contenido de aceite (41,5 %). La matriz de correlación de Pearson generado para los rasgos cuantitativos indicaron una correlación alta y positiva entre días a 50 % de floración y días a 80 % de maduración (0,9; valor p<0,0001), altura de planta y peso de la semilla (0,7; valor p<0,0001), peso de la semilla y porcentage de aceite (0,6; valor p<0,0001), peso de la semilla y número de cápsulas por planta (0,5; P valor <0,0001). Cuando los datos de caracterización se sometieron al método de la varianza se formaron principalmente dos grupos Se intentaron planteamientos DIVA-GIS para el análisis de la diversidad de germoplasma de linaza que fueron mapeados y fueron asignados a rasgos cuantitativos como la altura de planta, el número de cápsulas por planta y contenido de aceite de las semillas.

Analysis of genetic diversity in Indian and exotic linseed germplasm and identification of trait specific superior accessions

“…Thus cluster analysis showed fair association of genetic diversity with geographical diversity. However our clustering pattern do not corroborate the studies of Adugna and Labuschagne (2004), Nizar and Mulani (2015) and Dikshit and Sivaraj (2015) where…”

“…Significant positive correlation of boll and seed size with each other and with TSW and OC were found which suggest that selection for bold seeds and larger bolls may favor improvement in seed yield and oil content. Dikshit and Sivaraj (2015) had also reported significantly positive correlation between seed weight and oil content while negative association between DF 50% and TSW. As discussed earlier, most of the indigenous accessions under study were semi-erect or bushy type which are low in height and are oil type in nature is also evident from the negative association of PH and OC.…”

“…From the past, genetic diversity studies in crop plants mostly relied on the evaluation of morphological and agronomic traits (Upadhyaya 2002;Atta-Krah 2004). Earlier genetic variability assessment studies in linseed based on agro-morphological traits were done by Diederichsen, 2001;Diederichsen 2006;Diederichsen and Fu, 2008;Dikshit andSivaraj, 2015 andKhan 2013. The identification of trait specific promising accessions enhances the overall utilization of genebank collections and is fundamental for breeding and conservation of genetic resources.…”

“…Genetic advance was expressed Diederichsen and Fu (2008) for mean oil content, however we observed comparatively narrow range of variation in oil content due to small number of accessions under study. Recent studies by Nizar and Mulani (2015), Dikshit and Sivaraj (2015) indicated good variability for agro-morphological traits and oil content in Indian linseed germplasm.…”

Evaluation of genetic relationship among varieties of Capsicum annuum L. and Capsicum frutescens L. in West Africa using ISSR markers

“…In addition to establishing the effectiveness of the ISSR markers used for profiling the DNA, the differences and similarity in the band scores revealed the genetic relatedness among the varieties of the cultivated Capsicum species based on UPMGA analysis. The clustering of genotypes, in this case varieties, into groups in the UPMGA -based dendrogram was based on genetic similarities and genotypes that clustered into similar groups are closely related to each other (Maity et al., 2009; Bibi et al., 2013; Tyagi et al., 2014; Dikshita and Sivarajb, 2015). The dendrogram revealed that the varieties were broadly grouped into two major clusters.…”