Clone x Tester Crosses on Compatibility Level of Sweetpotato (Ipomoea batatas L.)

Abstract

Evaluation of compatibility on sweetpotato is very important to determine the crossing parents to increase the compatibility of controlled cross-pollination. This research was aimed to study the level of compatibility in controlled cross-pollination based on percentage of normal seedlings obtained from crosses. The research was conducted at Kendalpayak Experimental Station of ILETRI, Malang, Indonesia then followed by breaking seed dormancy and germination of seeds obtained. The genetic materials used were 17 accessions with high yielding potential and 3 accessions as tester for crossing. The results showed that there were differences in the compatibility levels of crossing combination and their compatibilities as male or female parents. Clone C-011 (Tester 2) was the most compatible as male parent, while clone C-141, C-007 and C-131 were the most compatible as female parents. Clone C-127 (Tester 3) was the most compatible as both male and female parents. Clone C-001 (Tester 1) could not be used as female parent due to high incompatibility.This compatible clone information is very useful in determining of both controlled crosses and open crosses in sweet potato in order to increase the breeding efficiency.

Sweetpotato [Ipomoea batatas (L.) Lam] genetic incompatibility effects in true hybrids seeds for new farmer cultivars development

“…A total of 1679 crosses produced 413 capsules (24.60%). Similar result was reported by Indriani et al (2021) who reported that 1747 crosses formed 432 fertile capsules (24.73%). The successful cross rate varied from 4.55% to 90.91% within family.…”

“…The successful cross rate varied from 4.55% to 90.91% within family. However, it was reported that the success cross rate ranged from 50% to 100% (Baafi et al, 2016) and from 0.20% to 18.00% (Indriani et al, 2021). The success rates of crosses depend on various factors such as compatibility, the vigour of parents and weather conditions (Lebot, 2009).…”

Caracterização morfológica, divergência genética e seleção de genitores de batata doce para cruzamentos

“…Allogamy, present in the species, due to the mechanisms of self-incompatibility and sterility (Indriani et al, 2021), promotes a high degree of heterozygosity to the germplasm, reflecting in wide genetic variability for different phenotypic descriptors (Ritschel, 1998), both of the root (number, shape, weight, color of the epidermis and pulp) (Silva et al, 2012), and shoot (length of the stems, color, shape, and number of leaves) (Azevedo et al, 2019).…”