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Accueil du site → Doctorat → Inde → 2010 → Study of inheritance and identification of molecular markers for fertility restorers in pigeonpea [Cajanus cajan (L.) Millspaugh]

International Crops Research Institute for the Semi-Arid Tropics (2010)

Study of inheritance and identification of molecular markers for fertility restorers in pigeonpea [Cajanus cajan (L.) Millspaugh]

Saxena, R K

Titre : Study of inheritance and identification of molecular markers for fertility restorers in pigeonpea [Cajanus cajan (L.) Millspaugh].

Auteur : Saxena, R K

Etablissement de soutenance : International Crops Research Institute for the Semi-Arid Tropics .

Grade : PhD thesis 2010

Résumé
An effort has been made to understand the genetics of fertility restoration (Fr) and linking molecular markers with this trait in pigeonpea. A set of 159 A-, B- and R- lines were screened for polymorphism with 148 simple sequence repeat (SSR) markers to choose the most diverse crossing parents. In total, 41 SSR markers showed polymorphism with 2 to 6 alleles and 0.01 to 0.81 polymorphism information content value across the lines surveyed. Two parental combinations for each early (ICPA 2039 × ICPR 2438 and ICPA 2039 × ICPR 2447) and late (ICPA 2043 × ICPR 2671 and ICPA 2043 × ICPR 3467) maturing groups were identified. Segregation data for male fertility/sterility of BC1F1 and F2 populations showed involvement of two duplicate dominant genes in governing male-fertility. Two genetic maps based on ICPA 2039 × ICPR 2447 and ICPA 2043 × ICPR 2671 mapping populations with 82 and 117 SSR loci, respectively were developed. QTL analysis of the F2 mapping populations based on ICPA 2039 × ICPR 2447 and ICPA 2043 × ICPR 2671 detected six (four major and two minor) and four (one major and three minor) QTLs involved in the fertility restoration, respectively.

Présentation ICRISAT

Page publiée le 22 septembre 2012, mise à jour le 1er février 2021