Genetic parameters of selection and stability and identification of divergent parents for hybridization in rice bean (Vigna umbellata Thunb. (Ohwi and Ohashi)) in India

Abstract

SU MMARYFifty-two genotypes of rice bean (Vigna umbellata Thunb. (Ohwi and Ohashi)), an under-cultivated crop, were evaluated in the rainy (kharif) seasons of 2001, 2002 and 2003 in the North Eastern Hill Region, India to select suitable genotypes for cultivation in the North Eastern Hill region and to identify promising parents for hybridization programmes. The germplasm studied comprised 44 Indian and eight foreign genotypes. A wide range of variability was observed for eight characters studied (plant height, number of branches/plant, stem thickness, pod length, number of seeds/pod, 100-seed weight, pod weight/plant and seed yield/plant). Number of days to mid-flowering and number of days to maturity showed little variation. High heritability (0 . 58) and high genetic advance (0 . 53) were observed for 100-seed weight, high heritability (0 . 93) and moderate genetic advance (0 . 37) for seed yield/plant, and high heritability (0 . 60) and low genetic advance (0 . 13) for number of days to mid-flowering. Since the main aim in rice bean breeding is to develop high yielding, early maturing genotypes with low plants, selection was based mainly on the mean performance of these three traits over the 3 years, as well as their stability. One of the genotypes, RBL 1, was very high yielding, although the yield was not stable across years. Another genotype, RBS 24, was very early maturing and had very short plants compared with the other genotypes studied. These two, along with several other genotypes selected, may be promising for a hybridization programme aiming to develop dwarf, early maturing genotypes with high yield. The best yielding genotypes, namely RBL 1, RCRB1-3 and IC 187911, may be recommended for cultivation in the shifting cultivation areas (Jhum) regions of North Eastern India.

Rice bean: a lesser known pulse with well-recognized potential

“…glabra (V. glabrescens), the only domesticated Asian Vigna that is tetraploid. Genetic studies in rice bean indicated that additive genetic components played a major role in the inheritance of size of primary leaves, seedling height, plant height, days of flower, number of pods, seeds per plant and seed size (Chatterjee and Dana 1977;Gupta et al 2009). These characters showed high heritability.…”

Development and characterization of a new set of genomic microsatellite markers in rice bean (Vigna umbellata (Thunb.) Ohwi and Ohashi) and their utilization in genetic diversity analysis of collections from North East India

“…However, the observed heterozygosity was higher (0.525 compared to 0.134). In a previous study with the accessions from the present set, Gupta et al [ 44 ] reported rich diversity in ten morphological characters. At the individual population level, the set from Nagaland, Manipur (which are closer to Myanmar and had free movement in pre-independent India) showed gene diversity similar to the report of Tian et al[ 1 ] for Myanmar.…”

Assessment of the Diuretic Properties of Rice Bean Accessions Using a Mouse Model and Identification of Active Polyphenolic Compounds

“…In traditional Chinese medicine, rice bean has been used as a natural diuretic. Numerous studies on rice bean in the past few decades have focused on its agronomic traits [ 33 , 34 , 35 ] and genetic markers [ 36 , 37 , 38 , 39 ], but there has been relatively little research on its medicinal value (e.g., using animal models to confirm its diuretic effect). There are several reasons for mouse models that are often used to study diuresis (e.g., dosage, simplicity, and reliability) [ 40 , 41 ].…”