Genetic base and relatedness of Indian early maturing potato (Solanum tuberosum) selections

Abstract

SUMMARYPedigree analysis was used to study the genetic background of 66 Indian early maturing potato selections, the pedigree of which was traced back to 35 ancestors. Six of the 35 contributed 0·42 of the genetic base, which shows the narrow genetic base of Indian early maturing genotypes. Genotypes 2814 (a)1 (f=0·145) and 3069 (d)4 (f=0·145) were the ancestors which appeared most frequently. Based on the coefficient of relationship, the 66 selections were grouped into seven groups with one common ancestor in almost all the selections within a group. The genotypes Kufri Ashoka, Kufri Pukhraj, AGB-69-1, Kufri Jyoti, Kufri Alankar, Kufri Lauvkar and Kufri Kuber were identified as very important parents/ancestors, carrying specific gene complexes valuable in new selections. Crosses between selections from different diversity groups can result in the selection of useful clones while increasing or maintaining genetic diversity, which is desirable to ensure sustainable breeding progress in the future.

Molecular analysis of genetic diversity among different groups of potato (Solanum tuberosumL.)

“…Various techniques like pedigree analysis (Gopal and Oyama 2005;Kumar et al 2011), RAPD (Chakrabarti et al 2001) and SSR (Chimote et al 2004;Ghislian et al 2006) have been previously employed to study genetic diversity in Indian potato varieties. Most of these studies have indicated narrow genetic base of Indian varieties.…”

“…Most breeders agree that it is increasingly difficult to obtain improvement in yield and other traits from among recombinants produced by crossing presently available parental clones. Narrow genetic base of Indian potato *Corresponding author's e-mail: rajcprs@hotmail.com; rajcprs@rediffmail.com 1Present address: Central Potato Research Station, Jalandhar 144 003, India Published by the Indian Society of Genetics & Plant Breeding, F2, First Floor, NASC Complex, PB#11312, IARI, New Delhi selections developed since 1990 has also been reported earlier (Gopal and Oyama 2005;Kumar et al 2011). North American (Mendoza and Haynes 1974;Plaisted and Hoopes 1989) and European varieties (Hawkes 1979;Ross 1986) have also been reported to have a narrow genetic base.…”

“…Potato breeding programmes based on Solanum tuberosum L. have a narrow genetic base (Bradshaw and Ramsay 2005;Kumar et al 2011). Most breeders agree that it is increasingly difficult to obtain improvement in yield and other traits from among recombinants produced by crossing presently available parental clones.…”

Evaluation of Potato Genotypes for Processing Traits in Late Autumn

“…Kufri Chipsona-1 and Kufri Chipsona-2 is not fully exploited due to occurrence of frost at the vegetative stage of the crop. Kumar et al (2004) documented that 120 days' crop duration was most suitable for Kufri Chipsona-1 and Kufri Chipsona-2 in the spring season crop. From stability analysis data, it is concluded that cv.…”