Genotype × Environment Interactions of Yield Traits in Backcross Introgression Lines Derived fromOryza sativacv. Swarna/Oryza nivara.
Advanced backcross introgression lines (BILs) developed from crosses ofOryza sativavar. Swarna/O. nivaraaccessions were grown and evaluated for yield and related traits. Trials were conducted for consecutive three seasons in field conditions in a randomized complete block design with three replications. Data on yield traits under irrigated conditions were analyzed using the Additive Main Effect and Multiplicative Interaction (AMMI), Genotype and Genotype × Environment Interaction (GGE) and modified rank-sum statistic (YSi) for yield stability. BILsviz., G3 (14S) and G6 (166S) showed yield stability across the seasons along with high mean yield performance. G3 is early in flowering with high yield and has good grain quality and medium height, hence could be recommended for most of the irrigated locations. G6 is a late duration genotype, with strong culm strength, high grain number and panicle weight. G6 has higher yield and stability than Swarna but has Swarna grain type. Among the varieties tested DRRDhan 40 and recurrent parent Swarna showed stability for yield traits across the seasons. The component traits thousand grain weight, panicle weight, panicle length, grain number and plant height explained highest genotypic percentage over environment and interaction factors and can be prioritized to dissect stable QTLs/ genes. These lines were genotyped using microsatellite markers covering the entire rice genome and also using a set of markers linked to previously reported yield QTLs. It was observed that wild derived lines with more than 70% of recurrent parent genome were stable and showed enhanced yield levels compared to genotypes with higher donor genome introgressions.
Crop Improvement Section, ICAR- National Professor Project, ICAR- Indian Institute of Rice Research Hyderabad, India.
Divya
D
Balakrishnan
Crop Improvement Section, ICAR- National Professor Project, ICAR- Indian Institute of Rice Research Hyderabad, India.
Desiraju
D
Subrahmanyam
Crop Improvement Section, ICAR- National Professor Project, ICAR- Indian Institute of Rice Research Hyderabad, India.
Jyothi
J
Badri
Crop Improvement Section, ICAR- National Professor Project, ICAR- Indian Institute of Rice Research Hyderabad, India.
Addanki Krishnam
AK
Raju
Crop Improvement Section, ICAR- National Professor Project, ICAR- Indian Institute of Rice Research Hyderabad, India.
Yadavalli Venkateswara
YV
Rao
Crop Improvement Section, ICAR- National Professor Project, ICAR- Indian Institute of Rice Research Hyderabad, India.
Kavitha
K
Beerelli
Crop Improvement Section, ICAR- National Professor Project, ICAR- Indian Institute of Rice Research Hyderabad, India.
Sukumar
S
Mesapogu
Crop Improvement Section, ICAR- National Professor Project, ICAR- Indian Institute of Rice Research Hyderabad, India.
Malathi
M
Surapaneni
Crop Improvement Section, ICAR- National Professor Project, ICAR- Indian Institute of Rice Research Hyderabad, India.
Revathi
R
Ponnuswamy
Crop Improvement Section, ICAR- National Professor Project, ICAR- Indian Institute of Rice Research Hyderabad, India.
G
G
Padmavathi
Crop Improvement Section, ICAR- National Professor Project, ICAR- Indian Institute of Rice Research Hyderabad, India.
V Ravindra
VR
Babu
Crop Improvement Section, ICAR- National Professor Project, ICAR- Indian Institute of Rice Research Hyderabad, India.
Sarla
S
Neelamraju
AMMI; BILs; GGE; Oryza nivara; stability; yield traits