'Pusa Srijan' is a dwarfing, clonal rootstock of Guava (Psidium guajava) developed by the Indian Agricultural Research Institute (IARI), New Delhi, resistant to root-knot nematode and wilt.

• Sapota: Khirni (Manilkara hexandra) is the universal commercial rootstock.
• Guava: Pusa Srijan is an IARI-developed clonal guava rootstock that imparts dwarfing and resistance to guava wilt.
• Grape: Rootstocks include Dogridge, Salt Creek, and Harmony.
• Mango: Rootstocks include Olour, Kurukkan, and Vellaikolumban.

According to W.L. Johannsen's classical pure-line theory (1903), the descendants/progeny of a single, self-fertilized, completely homozygous individual constitute a 'Pure line'.

• Pure line: Defined strictly as the progeny of a single homozygous, self-pollinated crop plant.
• Inbred line: Developed through artificial repeated selfing in naturally cross-pollinated species.
• Multi line: Mixture of pure lines that are phenotypically similar but differ in disease resistance genes.
• Isogenic line: Lines identical in genetic background except at a single target locus.

Sweet potato (Ipomoea batatas) is a short-day plant for tuberous storage root initiation, requiring a short daylength/photoperiod of 8 to 11 hours (specifically 9 hours) to trigger active tuberization.

• 7: Excessively short, impairing photosynthetic assimilate production.
• 9: Standard photoperiod (9-10 hours) that maximizes root swelling and tuberization hormones.
• 13: Promotes vegetative vine growth while inhibiting storage root development.
• 16: Long day condition completely arresting tuber initiation.