A4NH

Breeding CMS-based white seeded pigeonpea hybrids

Most people in Gujarat prefer vegetarian diets. Their protein requirement is derived from pulses, vegetables, and various milk products. However, tuar dal (pigeonpea) is, by far, the most popular and cheap source of protein in their diets. The state produces 2.4 lakh tonnes of pigeonpea annually, but this quantity is insufficient to meet the ever increasing domestic needs. Since the scope of increasing pigeonpea area in the state is limited, the emphasis is now centered on increasing its productivity. In…

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Candidate gene analysis for determinacy in pigeonpea (Cajanus spp.)

Pigeonpea (Cajanus cajan) is the sixth most important legume crop grown on ~5 million hectares globally. Determinacy is an agronomically important trait selected during pigeonpea domestication. In the present study, seven genes related to determinacy/flowering pattern in pigeonpea were isolated through a comparative genomics approach. Single nucleotide polymorphism (SNP) analysis of these candidate genes on 142 pigeonpea lines found a strong association of SNPs with the determinacy trait for three of the genes. Subsequently, QTL analysis highlighted one gene, CcTFL1,…

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Combining ability studies of pigeonpea cytoplasmic male sterile (CMS) lines with an obcordate leaf marker

Hybrid pigeonpea [Cajanus cajan (L.) Millsp.] breeding technology based on cytoplasmic male sterile (CMS) was recently developed in India. A program was initiated to track the purity of female parental lines by incorporating an obcordate leaf shape marker in established male sterile A-lines. Seven obcordate A-lines developed by backcrossing and selection were crossed with four known fertility restorers in line x tester mating design to study their general and specific combining ability. Higher magnitude of specific combining ability (SCA) effect…

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Effect of hydropriming on germination and seedling vigor of pigeonpea [Cajanus cajan (L.) Millsp.]

The effect of hydropriming on germination and seedling vigor of pigeonpea was studied on four hybrids and six inbred lines at the International Crops Research Institute for the Semi-Arid Tropics (ICRISAT), Patancheru, Andhra Pradesh, India. Seeds of each genotype were soaked in distilled water at room temperature (25°C) for two, four, and six hours. Non-primed seeds were used as a control. Research revealed that the length of hydropriming had a significant effect on number of seedlings germinated in day three,…

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Pigeonpea genotypes influence parasitization preference and survival and development of the Helicoverpa armigera larval parasitoid, Campoletis chlorideae

Studies were undertaken to identify pigeonpea, Cajanus cajan (L.) Millspaugh and the wild relative of pigeonpea, Cajanus scarabaeoides (L.) (accession ICPW 125,) genotypes that are hospitable to the pod borer, Helicoverpa armigera (Hübner) (Lepidoptera: Noctuidae) larval parasitoid, Campoletis chlorideae Uchida (Hymenoptera: Ichneumonidae) for the management of this pest in pigeonpea based cropping systems. Percentage parasitization of the H. armigera larvae by the C. chlorideae females was greater under no-choice conditions than under multi-choice conditions because of forced parasitization under no-choice…

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Response of germination to seed size and color of pigeonpea [Cajanus cajan (L.) Millsp.]

The effect of large and small seed size and color of pigeonpea on germination was studied on six hybrids and twelve inbred lines at the International Crops Research Institute for the Semi-Arid Tropics (ICRISAT), Patancheru, Andhra Pradesh, India. Seeds of each genotype were segregated into large and small seed classes according to their 100-seed weight (g). Experiment revealed that seed size had an effect on rate of germination up to seven days after sowing. In addition, seed color significantly affected…

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First information on heterotic groups in pigeonpea [Cajanus cajan (L.) Millsp.]

To break the decades-old yield barrier in pigeonpea [Cajanus cajan (L.) Millsp.] a hybrid breeding technology was successfully developed and the first two hybrids were recently released in India. In order to produce heterotic hybrid combinations, the first logical step is the identification and selection of genetically diverse parents with favorable alleles. In this context, the concept of classifying hybrid parents into different heterotic groups was developed and successfully used in maize and later adopted in other crops. Since hybrid…

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Contribution of Grain Legumes in Combating Food and Nutrition In-Security in Different Regions of the World

Food security is a complex issue, linked to availability and access to food, malnutrition in the population, economic development, environment, and local and global trade. Malnutrition hinders healthy growth and proper development of the human immune system affecting neurological and cognitive development especially in children. Protein calorie malnutrition is a major nutritional problem in many developing countries. Considering the projected increase of world population to 9 billion by 2050, it is a huge challenge to meet the food and nutritional…

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Challenges and opportunities of breeding early maturing pigeonpea hybrids

Recently, a hybrid breeding technology has been successfully developed in pigeonpea and three high yielding hybrids were released. This technology is based on cytoplasmic -nuclear male-sterility (CMS) and insect-aided natural out – crossing systems. These hybrids produced 25–40% more yield over the local cultivars in farmers'fields. The seed production technology of hybrids and their male and female parents has also now been perfected. These hybrids mature in 6–7 months hence have limited adaptation; to register greater impact of this technology…

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Grain Legumes

Grain Legumes is a partnership among four CGIAR Research Institutes: ICRISAT as lead center, CIAT, ICARDA and IITA, along with several public and private institutes and organizations, governments, and farmers worldwide.

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