Genetic Male Sterility in Pigeon Pea¹

Abstract

Six malcsterlle plantr, found in two a p arently u n r c laced murca In lgron pea (Cajanur c a l m L) Huth) did not produce poylen. Crouln sucteu was normal, Indl. tatlng that the Iaats were ?rmalcfertllc. White Uanc lucent anthcr co& dlstln lshed m a l~t e r i l e plan" from ferclle plants, which h a y yellowirh anthm. A sin lc rcceu~ve allele was r a nrlble for the male stcri~ity 8c. &bed hcre, Study o r m l c r w men18 revealed that tetrads in male amilc lants uparate and they c m p l a e l y dlsintegratcdj The ta a u m and the inter. cellular wall of the two ad scent mfccmrpnndn pmirted in the mature anthem. jrhc potential value of male aterlllty In breeding propanu 11 Mlcated.

Microsporogenesis and anther wall development in male-sterile and fertile lines of pigeon pea (Cajanus cajan (L.) Millsp.)

“…Reports of tapetum degeneration similar to that described above have been made by KAUL & SINGH (1966) in barley, OVERMAN &WARMKE (1972) in sorghum, andREDDi (1974) in Penn&turn typhoides. This feature differs from the persistent tapetum reported earlier by REDDY et al (1978) in pigeon pea. The tapetum breakdown, like that of the tetrads, could be caused by restriction in the supply of nutrients, although sections cut through stamen filaments revealed no lack of development of the vascular tissue.…”

“…3, 5, 7 and 9). This form of male-sterility differs from that described by REDDY et al (1978) in pigeon pea where microsporogenesis broke down at an older tetrad stage. Breakdown at a stage similar to that described above was reported in male-sterile tomatoes by RICK (1948).…”

“…The brown, shrivelled anther provides a fast and efficient way to recognize these plants in the field. The numerous cytological and morphological differences between this male-sterile source and that reported by REDDY et al (1978) suggests that these two cases of sterility are conditioned by different genes which have different physiological effects. The inheritance of the B15B sterility, and its genetic relationship to the translucent-anther sterility of REDDY et al (1978), are being studied.…”

Exploitation of the Leaf Variants in CGMS System Derived from A2 Cytoplasm in Pigeonpea [Cajanus cajan (L.) Millsp.]

“…First GMS system was developed by Reddy et al, 1978. Six hybrids derived from the GMS system were released so far with 30-50% of yield advantage over the high yielding checks.…”

Utilization of Different Height Variant Alleles in CGMS System Derived from A2 Cytoplasm in Pigeonpea [Cajanus cajan (L.) Millsp]

“…To break such productivity barriers, hybrid breeding will be option to enhance yield and productivity. For developing the hybrids, male sterile line controlled by nuclear gene was identified (Reddy et al, 1978). So far different ms genes were identified and utlized in hybrid breeding.…”