Pedigree, agronomic and molecular divergence of parents in relation to progeny performance in potato

Loiselle, F.; Tai, G. C. C.; Christie, B. R.

doi:10.1007/bf02360504

Cited by 6 publications

(4 citation statements)

References 35 publications

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“…Genetic divergence can be calculated from pedigree, phenotypic, biochemical or molecular information. However, the best source of information for measuring genetic divergence is uncertain; usually different estimates are not related (LefortBunson et al, 1986;Damerval et al, 1987;Loiselle et al, 1991). Unlike morphological, biochemical and molecular information, pedigree data do not require the observations to be recorded on the plant material and is not influenced by environment or the technique used.…”

Section: Discussionmentioning

confidence: 97%

“…In potato, Gopal & Minocha (1997) reported that genetic divergence of parents based on morphological characters could be used to predict the progeny performance. Loiselle et al (1991) reported that inbreeding coefficient was related to performance for tuber yield, total tuber number and specific combining ability effects in some potato progenies. The potential of pedigree analysis vis-à-vis biochemical or molecular diversity in selection of parents to predict progeny performance needs to be further investigated in potato.…”

Section: Discussionmentioning

confidence: 98%

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Genetic base of Indian potato selections as revealed by pedigree analysis

Gopal

Oyama

2005

Euphytica

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Pedigree analysis of the 77 advanced Indian potato selections showed that their origin could be traced to only 49 ancestors out of which 29 were exotic, which accounted for 69.52% of the total genomic constitution and maximum contribution (40.65%) was by 10 ancestors from U.K. Breeders' tendency was to involve adapted advanced clones as immediate parents. Coefficient of relationship between pair of selections ranged from 0 to 0.68. The success of the parents used was not related to region-specific choice of parents. The findings are discussed in the context of "genetic uniformity" and the relevance of having separate breeding programmes for the three major areas of potato cultivation in India. Attempt has also been made to give some directions for choosing selections for use as parents and release as cultivars based on their coefficient of relationship so as to broaden the genetic base of the future potato cultivars.

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Section: Discussionmentioning

confidence: 97%

Section: Discussionmentioning

confidence: 98%

Genetic base of Indian potato selections as revealed by pedigree analysis

Gopal

Oyama

2005

Euphytica

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“…High inbreeding coefficient affects yield in potato (Loiselle et al . 1991). Although it is desirable to use new parents in further breeding programmes to broaden the genetic base, at the same time potato breeders also want to maintain the complex of desired agronomic traits present in the existing popular cultivars.…”

Section: Discussionmentioning

confidence: 99%

“…1987; Loiselle et al . 1991). Braun & Wenzel (2004) reported that the known pedigree information was well-reflected in genetic distances estimated using molecular markers.…”

Section: Introductionmentioning

confidence: 99%

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

et al. 2010

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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.

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