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REGISTRATIONS OF GERMPLASM

Registration of CA2969, an Ascochyta Blight Resistant and Double-Podded Chickpea Germplasm

^a Departamento de Genética, Universidad de Córdoba, Aptdo 3048, 14080 Córdoba, Spain
^b CIFA. Aptdo 4240, 14080. Córdoba. Spain

^* Corresponding author (jrubio.cifao{at}cap.junta-andalucia.es)

CA2969 kabuli type chickpea (Cicer arietinum L.) (Reg. no. GP-228, PI 632396) was developed by CIFA (Centro de Investigación y Formación Agraria) in Córdoba, Spain, in cooperation with the Department of Genetics of the University of Córdoba.

Chickpea usually develops a single flower (hence also a single pod) per node, but some lines develop two flowers and pods per node or peduncle. CA2969 is a double-podded F_6:7 line, with semierect habit, early flowering and good resistance to Ascochyta blight [caused by Ascochyta rabiei (Pass.) Labrousse; syn. Phoma rabiei (Pass.) Khune & J.N. Kapoor], a disease that can produce 100% yield losses in severely affected fields (Nene, 1984; Singh and Reddy, 1996). Development of blight resistant lines made possible the introduction of winter sowing in the Mediterranean Basin with the prospect of increasing chickpea production (Singh and Reddy, 1996). The double-podded trait is known to contribute to increased stability of seed yield in chickpea (Rubio et al., 1998; Kumar et al., 2000).

CA2969 was derived from the cross [CA2156 x JG62 (PI 439821)]F₄ x ILC3279 (PI 471915). The double podded trait comes from the female parent, a kabuli F_3:4 line. This F_3:4 line came from the cross between a single-podded local kabuli cultivar grown in Spain, CA2156, which is characterized by very large seeds, and JG62, a local desi cultivar from India that has the double-pod trait. The source of Ascochyta blight resistance, ILC3279, is a kabuli line that was provided by ICARDA (Center for Agricultural Research in Dry Areas) and used as the male parent.

A population of F_6:7 lines was obtained following the single seed descent method. This population was evaluated for Ascochyta blight in the field for two consecutive years. Each year, the lines were sown in rows 2 m long, and a susceptible cultivar was included between rows as a check and spreader. A set of 20 F_6:7 lines were selected as resistant to Ascochyta blight. These lines were characterized for single or double pods, semierect or erect habit and time of flowering.

After selection and multiplication, 12 lines were chosen and sown in 1999 and 2000 at five locations each year, in winter and spring in Andalucia (South Spain). This region represents around 40% of the Spanish chickpea cultivated area. Sowing at each location was performed following a randomized block design with three replications, the unit plot being four rows 9 m long with 0.5 m between rows. ‘Fardón’, derived from ILC72, was the control line in winter sowing; it is a kabuli line with resistance to Ascochyta blight. ‘Blanco Lechoso’ was the control line for spring sowing; it is a local kabuli line with very large seeds and is susceptible to Ascochyta blight. Blanco Lechoso is appreciated by farmers in Spain because of its good quality and high value in the market.

The trials in all environments were evaluated for yield and weight of 100 seeds. In the winter sowing, CA2969 had the highest mean yield in all environments (1659 kg ha^-1). The mean yield of Fardón was 1469 kg ha^-1. Seeds of CA2969 weighted 30.1 g 100 seed^-1, which compared favorably with Fardón (26.8 g 100 seed^-1). In spring sowing, CA2969 was also more productive than Blanco Lechoso (1107 kg ha^-1 and 695 kg ha^-1 respectively), but seeds of Blanco Lechoso were heavier (45.5 g 100 seed^-1). CA2969 also showed good yield stability. It is ranked among the top five for all environments both in winter and in spring sowing.

Thus, CA2969 is an additional source of genes for Ascochyta blight, double pod, and semierect habit—all traits of agronomic importance. CA2969 will be maintained by CIFA in Córdoba, Spain. Small samples of seed for research purposes may be obtained from the corresponding author.

NOTES

Registration by CSSA.

Accepted for publication December 31, 2002.

REFERENCES

• Kumar, J., K. Srivastava, and M. Ganesh. 2000. Penetrance and Exppresivity of the gene for double podding in chickpea. J. Hered. 91:234–236.[Abstract/Free Full Text]
• Nene, Y.L. 1984. A review of Ascochyta blight of chickpea (Cicer arietinum L.). p. 17–32. In M.C. Saxena and K.B. Singh (ed.) Ascochyta blight and winter sowing of chickpea. Martinus Nijhoff/Dr. W. Junk, The Hague, Netherlands.
• Rubio, J., M.T. Moreno, J.I. Cubero, and J. Gil. 1998. Effect of the gene for double pod in chickpea on yield, yield components and stability of yield. Plant Breed. 117:585–587.
• Singh, K.B., and M.V. Reddy. 1996. Improving chickpea yield by incorporating resistance to Ascochyta bligh. Theor. Appl. Genet. 92:509–515.

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